256534 has 8 divisors (see below), whose sum is σ = 398160. Its totient is φ = 123816.

The previous prime is 256517. The next prime is 256541. The reversal of 256534 is 435652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256499 and 256508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (49770).

2²⁵⁶⁵³⁴ is an apocalyptic number.

256534 is a deficient number, since it is larger than the sum of its proper divisors (141626).

256534 is a wasteful number, since it uses less digits than its factorization.

256534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454.

The product of its digits is 3600, while the sum is 25.

The square root of 256534 is about 506.4918558082. The cubic root of 256534 is about 63.5401610082.

The spelling of 256534 in words is "two hundred fifty-six thousand, five hundred thirty-four".