256895 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 203680.

The previous prime is 256889. The next prime is 256901. The reversal of 256895 is 598652.

It is an interprime number because it is at equal distance from previous prime (256889) and next prime (256901).

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

It is not a de Polignac number, because 256895 - 2⁶ = 256831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821 + ... + 1089.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁵⁶⁸⁹⁵ is an apocalyptic number.

256895 is a deficient number, since it is larger than the sum of its proper divisors (54145).

256895 is a wasteful number, since it uses less digits than its factorization.

256895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465.

The product of its digits is 21600, while the sum is 35.

The square root of 256895 is about 506.8481034787. The cubic root of 256895 is about 63.5699520521.

The spelling of 256895 in words is "two hundred fifty-six thousand, eight hundred ninety-five".