255756 has 12 divisors (see below), whose sum is σ = 596792. Its totient is φ = 85248.

The previous prime is 255743. The next prime is 255757. The reversal of 255756 is 657552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×255756² = 130822263072, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (255757) by changing a digit.

255756 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, 10645 + ... + 10668.

2²⁵⁵⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

255756 is an abundant number, since it is smaller than the sum of its proper divisors (341036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255756 is a wasteful number, since it uses less digits than its factorization.

255756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21320 (or 21318 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 255756 is about 505.7232444727. The cubic root of 255756 is about 63.4758624444.

Adding to 255756 its product of digits (10500), we get a square (266256 = 516²).

The spelling of 255756 in words is "two hundred fifty-five thousand, seven hundred fifty-six".