256286025 has 36 divisors (see below), whose sum is σ = 476049392. Its totient is φ = 136682640.

The previous prime is 256286011. The next prime is 256286027. The reversal of 256286025 is 520682652.

256286025 is a `hidden beast` number, since 2 + 5 + 628 + 6 + 0 + 25 = 666.

It is not a de Polignac number, because 256286025 - 2⁵ = 256285993 is a prime.

It is a super-2 number, since 2×256286025² = 131365053220601250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256286027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15019 + ... + 27168.

Almost surely, 2^256286025 is an apocalyptic number.

256286025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256286025 is a deficient number, since it is larger than the sum of its proper divisors (219763367).

256286025 is an equidigital number, since it uses as much as digits as its factorization.

256286025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42212 (or 42195 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 256286025 is about 16008.9357859915. The cubic root of 256286025 is about 635.1968100554.

The spelling of 256286025 in words is "two hundred fifty-six million, two hundred eighty-six thousand, twenty-five".