256513124 has 12 divisors (see below), whose sum is σ = 513026304. Its totient is φ = 109934184.

The previous prime is 256513123. The next prime is 256513139. The reversal of 256513124 is 421315652.

256513124 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (256513121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4580564 + ... + 4580619.

It is an arithmetic number, because the mean of its divisors is an integer number (42752192).

Almost surely, 2^256513124 is an apocalyptic number.

It is an amenable number.

256513124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256513124 is a wasteful number, since it uses less digits than its factorization.

256513124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161194 (or 9161192 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 256513124 is about 16016.0270978792. The cubic root of 256513124 is about 635.3843738957.

Adding to 256513124 its reverse (421315652), we get a palindrome (677828776).

The spelling of 256513124 in words is "two hundred fifty-six million, five hundred thirteen thousand, one hundred twenty-four".