256413252 has 12 divisors (see below), whose sum is σ = 598297616. Its totient is φ = 85471080.

The previous prime is 256413229. The next prime is 256413259. The reversal of 256413252 is 252314652.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (256413259) 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, 10683874 + ... + 10683897.

Almost surely, 2^256413252 is an apocalyptic number.

It is an amenable number.

256413252 is an abundant number, since it is smaller than the sum of its proper divisors (341884364).

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

256413252 is a wasteful number, since it uses less digits than its factorization.

256413252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21367778 (or 21367776 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 256413252 is about 16012.9089174953. The cubic root of 256413252 is about 635.3019020328.

The spelling of 256413252 in words is "two hundred fifty-six million, four hundred thirteen thousand, two hundred fifty-two".