256157 has 12 divisors (see below), whose sum is σ = 295260. Its totient is φ = 221760.

The previous prime is 256147. The next prime is 256163. The reversal of 256157 is 751652.

256157 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in 2 ways, for example, as 139876 + 116281 = 374^2 + 341^2 .

It is not a de Polignac number, because 256157 - 2⁶ = 256093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256157.

It is not an unprimeable number, because it can be changed into a prime (256117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473 + ... + 3545.

It is an arithmetic number, because the mean of its divisors is an integer number (24605).

2²⁵⁶¹⁵⁷ is an apocalyptic number.

It is an amenable number.

256157 is a deficient number, since it is larger than the sum of its proper divisors (39103).

256157 is a wasteful number, since it uses less digits than its factorization.

256157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 113 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 256157 is about 506.1195510944. The cubic root of 256157 is about 63.5090197368.

The spelling of 256157 in words is "two hundred fifty-six thousand, one hundred fifty-seven".