256655 has 8 divisors (see below), whose sum is σ = 352032. Its totient is φ = 175968.

The previous prime is 256651. The next prime is 256661. The reversal of 256655 is 556652.

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

It is a cyclic number.

It is not a de Polignac number, because 256655 - 2² = 256651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3632 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (44004).

2²⁵⁶⁶⁵⁵ is an apocalyptic number.

256655 is a deficient number, since it is larger than the sum of its proper divisors (95377).

256655 is an equidigital number, since it uses as much as digits as its factorization.

256655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7345.

The product of its digits is 9000, while the sum is 29.

The square root of 256655 is about 506.6112908335. The cubic root of 256655 is about 63.5501494841.

It can be divided in two parts, 25 and 6655, that multiplied together give a cube (166375 = 55³).

The spelling of 256655 in words is "two hundred fifty-six thousand, six hundred fifty-five".