256751 has 8 divisors (see below), whose sum is σ = 296784. Its totient is φ = 219520.

The previous prime is 256723. The next prime is 256757. The reversal of 256751 is 157652.

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 256751 - 2⁶ = 256687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256751.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256751.

It is not an unprimeable number, because it can be changed into a prime (256757) 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, 500 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (37098).

2²⁵⁶⁷⁵¹ is an apocalyptic number.

256751 is a deficient number, since it is larger than the sum of its proper divisors (40033).

256751 is a wasteful number, since it uses less digits than its factorization.

256751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401.

The product of its digits is 2100, while the sum is 26.

The square root of 256751 is about 506.7060291727. The cubic root of 256751 is about 63.5580719921.

Subtracting from 256751 its reverse (157652), we obtain a palindrome (99099).

It can be divided in two parts, 25 and 6751, that added together give a palindrome (6776).

The spelling of 256751 in words is "two hundred fifty-six thousand, seven hundred fifty-one".