256734 has 24 divisors (see below), whose sum is σ = 589680. Its totient is φ = 80448.

The previous prime is 256723. The next prime is 256757. The reversal of 256734 is 437652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 256698 and 256707.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 114 + ... + 725.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2²⁵⁶⁷³⁴ is an apocalyptic number.

256734 is an abundant number, since it is smaller than the sum of its proper divisors (332946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256734 is a wasteful number, since it uses less digits than its factorization.

256734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 861 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 256734 is about 506.6892538825. The cubic root of 256734 is about 63.5566691919.

It can be divided in two parts, 2567 and 34, that multiplied together give a palindrome (87278).

The spelling of 256734 in words is "two hundred fifty-six thousand, seven hundred thirty-four".