256995 has 12 divisors (see below), whose sum is σ = 445536. Its totient is φ = 137040.

The previous prime is 256981. The next prime is 257003. The reversal of 256995 is 599652.

256995 is a `hidden beast` number, since 2 + 569 + 95 = 666.

256995 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 256995 - 2⁶ = 256931 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256995.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2811 + ... + 2900.

It is an arithmetic number, because the mean of its divisors is an integer number (37128).

2²⁵⁶⁹⁹⁵ is an apocalyptic number.

256995 is a deficient number, since it is larger than the sum of its proper divisors (188541).

256995 is a wasteful number, since it uses less digits than its factorization.

256995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722 (or 5719 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 256995 is about 506.9467427650. The cubic root of 256995 is about 63.5781994820.

The spelling of 256995 in words is "two hundred fifty-six thousand, nine hundred ninety-five".