256425995 has 32 divisors (see below), whose sum is σ = 372556800. Its totient is φ = 165511296.

The previous prime is 256425959. The next prime is 256425997. The reversal of 256425995 is 599524652.

It is a cyclic number.

It is not a de Polignac number, because 256425995 - 2²² = 252231691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256425997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109901 + ... + 112209.

It is an arithmetic number, because the mean of its divisors is an integer number (11642400).

Almost surely, 2^256425995 is an apocalyptic number.

256425995 is a deficient number, since it is larger than the sum of its proper divisors (116130805).

256425995 is a wasteful number, since it uses less digits than its factorization.

256425995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its digits is 972000, while the sum is 47.

The square root of 256425995 is about 16013.3068102750. The cubic root of 256425995 is about 635.3124260833.

The spelling of 256425995 in words is "two hundred fifty-six million, four hundred twenty-five thousand, nine hundred ninety-five".