256071425 has 12 divisors (see below), whose sum is σ = 336207276. Its totient is φ = 192806400.

The previous prime is 256071419. The next prime is 256071449. The reversal of 256071425 is 524170652.

It can be written as a sum of positive squares in 6 ways, for example, as 11336689 + 244734736 = 3367^2 + 15644^2 .

It is not a de Polignac number, because 256071425 - 2⁸ = 256071169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256071391 and 256071400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300836 + ... + 301685.

It is an arithmetic number, because the mean of its divisors is an integer number (28017273).

Almost surely, 2^256071425 is an apocalyptic number.

256071425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256071425 is a deficient number, since it is larger than the sum of its proper divisors (80135851).

256071425 is a wasteful number, since it uses less digits than its factorization.

256071425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602548 (or 602543 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 256071425 is about 16002.2318755854. The cubic root of 256071425 is about 635.0194674421.

The spelling of 256071425 in words is "two hundred fifty-six million, seventy-one thousand, four hundred twenty-five".