256797 has 8 divisors (see below), whose sum is σ = 380480. Its totient is φ = 171180.

The previous prime is 256771. The next prime is 256799. The reversal of 256797 is 797652.

256797 is a `hidden beast` number, since 2 + 567 + 97 = 666.

It is not a de Polignac number, because 256797 - 2⁸ = 256541 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256799) 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, 4729 + ... + 4782.

It is an arithmetic number, because the mean of its divisors is an integer number (47560).

2²⁵⁶⁷⁹⁷ is an apocalyptic number.

256797 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

256797 is a deficient number, since it is larger than the sum of its proper divisors (123683).

256797 is an equidigital number, since it uses as much as digits as its factorization.

256797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520 (or 9514 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 256797 is about 506.7514183503. The cubic root of 256797 is about 63.5618674940.

The spelling of 256797 in words is "two hundred fifty-six thousand, seven hundred ninety-seven".