256479 has 16 divisors (see below), whose sum is σ = 373248. Its totient is φ = 156032.

The previous prime is 256471. The next prime is 256483. The reversal of 256479 is 974652.

It is a cyclic number.

It is not a de Polignac number, because 256479 - 2³ = 256471 is a prime.

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 256479.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2344 + ... + 2450.

It is an arithmetic number, because the mean of its divisors is an integer number (23328).

2²⁵⁶⁴⁷⁹ is an apocalyptic number.

256479 is a deficient number, since it is larger than the sum of its proper divisors (116769).

256479 is a wasteful number, since it uses less digits than its factorization.

256479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174.

The product of its digits is 15120, while the sum is 33.

The square root of 256479 is about 506.4375578489. The cubic root of 256479 is about 63.5356197536.

The spelling of 256479 in words is "two hundred fifty-six thousand, four hundred seventy-nine".