256371 has 8 divisors (see below), whose sum is σ = 345744. Its totient is φ = 168960.

The previous prime is 256369. The next prime is 256391. The reversal of 256371 is 173652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256371 - 2¹ = 256369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256301) 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, 150 + ... + 731.

It is an arithmetic number, because the mean of its divisors is an integer number (43218).

2²⁵⁶³⁷¹ is an apocalyptic number.

256371 is a deficient number, since it is larger than the sum of its proper divisors (89373).

256371 is an equidigital number, since it uses as much as digits as its factorization.

256371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

The product of its digits is 1260, while the sum is 24.

The square root of 256371 is about 506.3309194588. The cubic root of 256371 is about 63.5267004915.

The spelling of 256371 in words is "two hundred fifty-six thousand, three hundred seventy-one".