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160 is the natural number following one hundred fifty-nine and preceding one hundred sixty-one.
| #redirect Numbers (1 E2) | |
| Ordinal | One hundred [and] sixty |
| Cardinal | 160th |
| Factorization | |
| Roman numeral | CLX |
| Binary | 10100000 |
| Hexadecimal | A0 |
One hundred sixty is the sum of the first 11 primes, as well as the sum of the cubes of the first three primes. Given 160, the Mertens function returns 0. 160 is the smallest number n with exactly 12 solutions to the equation φ(x) = n.
One hundred sixty is also:
161 = 7 23, sum of five consecutive primes (23 + 29 + 31 + 37 + 41), hexagonal pyramidal number
162 = 2 3^4, Harshad number, divisible by φ(162), untouchable number
164 = 2^2 41, Mertens function returns 0
165 = 3 5 11, sphenic numberA sphenic number is a positive integer that is the product of three distinct prime factors. The Mobius function returns -1 when passed any sphenic number. Note that this definition is more stringent than simply requiring the integer to have exactly three, 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, self numberDiscovered in 1949 by the Indian mathematician D. Kaprekar a self number or Colombian number is an integer which, in a given base, can not be generated by any other integer added to the sum of its digits. For example, 21 is not a self number, since it can
166 = 2 83, Smith numberA Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. In the case of numbers that are not square-free, the factorization is written without exponents, writing the repeated factor as, Mertens function returns 0, centered triangular numberA centered triangular number is a centered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers. The centered triangular number for n is given by the formula The foll
168 = 2^3 3 7, sum of four consecutive primes (37 + 41 + 43 + 47)