256245424 has 20 divisors (see below), whose sum is σ = 509894944. Its totient is φ = 124659648.

The previous prime is 256245401. The next prime is 256245433. The reversal of 256245424 is 424542652.

It is a self number, because there is not a number n which added to its sum of digits gives 256245424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215832 + ... + 217015.

Almost surely, 2^256245424 is an apocalyptic number.

It is an amenable number.

256245424 is a deficient number, since it is larger than the sum of its proper divisors (253649520).

256245424 is a wasteful number, since it uses less digits than its factorization.

256245424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432892 (or 432886 counting only the distinct ones).

The product of its digits is 76800, while the sum is 34.

The square root of 256245424 is about 16007.6676627171. The cubic root of 256245424 is about 635.1632655190.

The spelling of 256245424 in words is "two hundred fifty-six million, two hundred forty-five thousand, four hundred twenty-four".