256326725 has 12 divisors (see below), whose sum is σ = 322201476. Its totient is φ = 202250880.

The previous prime is 256326683. The next prime is 256326761. The reversal of 256326725 is 527623652.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 134689 + 256192036 = 367^2 + 16006^2 .

It is not a de Polignac number, because 256326725 - 2²⁴ = 239549509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68402 + ... + 72051.

It is an arithmetic number, because the mean of its divisors is an integer number (26850123).

Almost surely, 2^256326725 is an apocalyptic number.

256326725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256326725 is a deficient number, since it is larger than the sum of its proper divisors (65874751).

256326725 is a wasteful number, since it uses less digits than its factorization.

256326725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140536 (or 140531 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 256326725 is about 16010.2069005994. The cubic root of 256326725 is about 635.2304328300.

The spelling of 256326725 in words is "two hundred fifty-six million, three hundred twenty-six thousand, seven hundred twenty-five".