256040625 has 48 divisors (see below), whose sum is σ = 440971776. Its totient is φ = 132000000.

The previous prime is 256040597. The next prime is 256040633. The reversal of 256040625 is 526040652.

It is not a de Polignac number, because 256040625 - 2⁷ = 256040497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256040592 and 256040601.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 290185 + ... + 291065.

It is an arithmetic number, because the mean of its divisors is an integer number (9186912).

Almost surely, 2^256040625 is an apocalyptic number.

256040625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256040625 is a deficient number, since it is larger than the sum of its proper divisors (184931151).

256040625 is an frugal number, since it uses more digits than its factorization.

256040625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 256040625 is about 16001.2694808881. The cubic root of 256040625 is about 634.9940065981.

The spelling of 256040625 in words is "two hundred fifty-six million, forty thousand, six hundred twenty-five".