256379 has 4 divisors (see below), whose sum is σ = 257400. Its totient is φ = 255360.

The previous prime is 256369. The next prime is 256391. The reversal of 256379 is 973652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256379 - 2⁴ = 256363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256349) 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 3 ways as a sum of consecutive naturals, for example, 164 + ... + 734.

It is an arithmetic number, because the mean of its divisors is an integer number (64350).

2²⁵⁶³⁷⁹ is an apocalyptic number.

256379 is a deficient number, since it is larger than the sum of its proper divisors (1021).

256379 is an equidigital number, since it uses as much as digits as its factorization.

256379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its digits is 11340, while the sum is 32.

The square root of 256379 is about 506.3388193690. The cubic root of 256379 is about 63.5273612635.

The spelling of 256379 in words is "two hundred fifty-six thousand, three hundred seventy-nine".