256595 has 16 divisors (see below), whose sum is σ = 337440. Its totient is φ = 186624.

The previous prime is 256589. The next prime is 256603. The reversal of 256595 is 595652.

It is a cyclic number.

It is not a de Polignac number, because 256595 - 2⁴ = 256579 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256595.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3479 + ... + 3551.

It is an arithmetic number, because the mean of its divisors is an integer number (21090).

2²⁵⁶⁵⁹⁵ is an apocalyptic number.

256595 is a deficient number, since it is larger than the sum of its proper divisors (80845).

256595 is a wasteful number, since it uses less digits than its factorization.

256595 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134.

The product of its digits is 13500, while the sum is 32.

The square root of 256595 is about 506.5520703738. The cubic root of 256595 is about 63.5451969134.

The spelling of 256595 in words is "two hundred fifty-six thousand, five hundred ninety-five".