255657 has 8 divisors (see below), whose sum is σ = 352000. Its totient is φ = 164880.

The previous prime is 255653. The next prime is 255659. The reversal of 255657 is 756552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255657 - 2² = 255653 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 255657.

It is not an unprimeable number, because it can be changed into a prime (255653) 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 7 ways as a sum of consecutive naturals, for example, 1282 + ... + 1467.

It is an arithmetic number, because the mean of its divisors is an integer number (44000).

2²⁵⁵⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

255657 is a deficient number, since it is larger than the sum of its proper divisors (96343).

255657 is a wasteful number, since it uses less digits than its factorization.

255657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

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

The square root of 255657 is about 505.6253553769. The cubic root of 255657 is about 63.4676711457.

The spelling of 255657 in words is "two hundred fifty-five thousand, six hundred fifty-seven".