256712025 has 24 divisors (see below), whose sum is σ = 426361600. Its totient is φ = 136290240.

The previous prime is 256712017. The next prime is 256712063. The reversal of 256712025 is 520217652.

It is not a de Polignac number, because 256712025 - 2³ = 256712017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256711983 and 256712001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9051 + ... + 24399.

Almost surely, 2^256712025 is an apocalyptic number.

256712025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256712025 is a deficient number, since it is larger than the sum of its proper divisors (169649575).

256712025 is a wasteful number, since it uses less digits than its factorization.

256712025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15585 (or 15580 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 256712025 is about 16022.2353309393. The cubic root of 256712025 is about 635.5485577454.

Adding to 256712025 its reverse (520217652), we get a palindrome (776929677).

The spelling of 256712025 in words is "two hundred fifty-six million, seven hundred twelve thousand, twenty-five".