256763425 has 12 divisors (see below), whose sum is σ = 318690540. Its totient is φ = 205214720.

The previous prime is 256763417. The next prime is 256763431. The reversal of 256763425 is 524367652.

It can be written as a sum of positive squares in 6 ways, for example, as 18740241 + 238023184 = 4329^2 + 15428^2 .

It is not a de Polignac number, because 256763425 - 2³ = 256763417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25521 + ... + 34129.

It is an arithmetic number, because the mean of its divisors is an integer number (26557545).

Almost surely, 2^256763425 is an apocalyptic number.

256763425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256763425 is a deficient number, since it is larger than the sum of its proper divisors (61927115).

256763425 is a wasteful number, since it uses less digits than its factorization.

256763425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812 (or 9807 counting only the distinct ones).

The product of its digits is 302400, while the sum is 40.

The square root of 256763425 is about 16023.8392715354. The cubic root of 256763425 is about 635.5909723484.

The spelling of 256763425 in words is "two hundred fifty-six million, seven hundred sixty-three thousand, four hundred twenty-five".