256156 has 12 divisors (see below), whose sum is σ = 474768. Its totient is φ = 120512.

The previous prime is 256147. The next prime is 256163. The reversal of 256156 is 651652.

It is a self number, because there is not a number n which added to its sum of digits gives 256156.

It is a congruent number.

It is an unprimeable number.

256156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (39564).

2²⁵⁶¹⁵⁶ is an apocalyptic number.

It is an amenable number.

256156 is a deficient number, since it is larger than the sum of its proper divisors (218612).

256156 is a wasteful number, since it uses less digits than its factorization.

256156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788 (or 3786 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 256156 is about 506.1185631846. The cubic root of 256156 is about 63.5089370933.

The spelling of 256156 in words is "two hundred fifty-six thousand, one hundred fifty-six".