256608125 has 20 divisors (see below), whose sum is σ = 334617888. Its totient is φ = 196350000.

The previous prime is 256608119. The next prime is 256608181. The reversal of 256608125 is 521806652.

It is a de Polignac number, because none of the positive numbers 2^k-256608125 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5450 + ... + 23300.

Almost surely, 2^256608125 is an apocalyptic number.

256608125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256608125 is a deficient number, since it is larger than the sum of its proper divisors (78009763).

256608125 is an equidigital number, since it uses as much as digits as its factorization.

256608125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17894 (or 17879 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 256608125 is about 16018.9926337457. The cubic root of 256608125 is about 635.4628035418.

The spelling of 256608125 in words is "two hundred fifty-six million, six hundred eight thousand, one hundred twenty-five".