Home > 4000 (number)

Four thousand (4000) is the natural number following 3999 and preceding 4001. It is a decagonal number.

Selected numbers in the range 4001-4999

4005 - triangular number

4010 - magic constant of n×n magic square and n-Queens Problem for n = 20.

4011 - PLU code for yellow bananas

4019 - Sophie Germain prime

4028 - sum of the first 45 primes

4030 - 3rd weird number

4031 - sum of the cubes of the first six primes

4033 - 6th super-Poulet number

4060 - tetrahedral numberA tetrahedral number or triangular pyramidal number is a figurate number that represents a pyramid with a base and three sides, that is, a tetrahedron. The tetrahedral number for n is the sum of the first n triangular numbers added up. The first few tetra

4073 - Sophie Germain prime

4095 - triangular number

4096 - 12th power of twoIn mathematics, a power of two is any of the nonnegative integer powers of the number two; in other words, two times itself a certain number of times. Note that one is a power (the zeroth power) of two. Written in binary, a power of two always has the for, 16th cubeIn arithmetic and algebra, the cube of a number n is its third power — the result of multiplying it by itself two times: n''3 n × n × n''. This is also the volume formula for a geometric cube of side length n giving rise to the name. The term cube or cube, 64^2

4104 - can be expressed as a sum of cubes in more than one way

4181 - Fibonacci numberIn mathematics, the Fibonacci numbers form a sequence defined recursively by:

In words: you start with 0 and 1, and then produce the next Fibonacci number by adding the two previous Fibonacci numbers. The first Fibonacci numbers (sequence A000045 in OEI

4186 - triangular number

4200 - nonagonal numberA nonagonal number or enneagonal number is a figurate number that represents a nonagon. The nonagonal number for n is given by the formula: The first few nonagonal numbers are:

1, 9, 24, 46, 75, 111, 154, 204, 261, 325, 396, 474, 559, 651, 750, 856, 969, pentagonal pyramidal numberA pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. The first few are 1, 6, 18, 40, 75, 126, 196, 288, 405, 550, 726, 936, 1183, 1470, 1800, 2176, 2601, 3078, 3610, 4200, 4851, 5566, 6348, 7200, 8125, and 9126.

4210 - 11th semi-meandric number

4211 - Sophie Germain prime

4219 - cuban primeA cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y''. The first of these equations is and the first few cuban primes from this equation are 7, 19, 37, 61, 127, 271, 331, 397, 547 of the form x = y + 1

4225 = 65^2

4227 - sum of the first 46 primes

4257 - decagonal number

4271 - Sophie Germain prime

4278 - triangular number

4324 - 23rd square pyramidal number

4349 - Sophie Germain prime

4356 - sum of the cubes of the first eleven integers, 66^2

4369 - 7th super-Poulet number

4371 - triangular number

4373 - Sophie Germain prime

4391 - Sophie Germain prime

4409 - Sophie Germain prime

4438 - sum of the first 47 primes

4446 - nonagonal number

4447 - cuban prime of the form x = y + 1

4465 - triangular number

4481 - Sophie Germain prime

4489 = 67^2

4495 - tetrahedral number

4503 - largest number not the sum of four or fewer squares of composites

4505 - 5th Zeisel number

4522 - decagonal number

4560 - triangular number

4579 - octahedral number

4607 - Woodall number

4624 = 68^2

4641 - magic constant of n×n magic square and n-Queens Problem for n = 21.

4656 - triangular number

4661 - sum of the first 48 primes

4681 - 8th super-Poulet number

4699 - nonagonal number

4705 = 48² + 49² = 17² + 18² + ... 26²

4727 - sum of the squares of the first twelve primes

4733 - Sophie Germain prime

4753 - triangular number

4761 = 69^2

4788 - 14th Keith number

4793 - Sophie Germain prime

4795 - decagonal number

4801 - cuban prime of the form x = y + 2

4851 - triangular number, pentagonal pyramidal number

4871 - Sophie Germain prime

4879 - 11th Kaprekar number

4888 - sum of the first 49 primes

4900 - the only square-pyramidal square other than 1[1], 70^2

4913 - 17th cube

4919 - Sophie Germain prime

4941 - centered cube number

4943 - Sophie Germain prime

4950 - triangular number, 12th Kaprekar number

4959 - nonagonal number

4960 - tetrahedral number; greater of 4th pair of Smith brothers