256475 has 6 divisors (see below), whose sum is σ = 318060. Its totient is φ = 205160.

The previous prime is 256471. The next prime is 256483. The reversal of 256475 is 574652.

It is not a de Polignac number, because 256475 - 2² = 256471 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256475.

It is not an unprimeable number, because it can be changed into a prime (256471) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5105 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (53010).

2²⁵⁶⁴⁷⁵ is an apocalyptic number.

256475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256475 is a deficient number, since it is larger than the sum of its proper divisors (61585).

256475 is a wasteful number, since it uses less digits than its factorization.

256475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269 (or 10264 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 256475 is about 506.4336086794. The cubic root of 256475 is about 63.5352894552.

It can be divided in two parts, 25647 and 5, that added together give a palindrome (25652).

The spelling of 256475 in words is "two hundred fifty-six thousand, four hundred seventy-five".