256642052 has 12 divisors (see below), whose sum is σ = 449337420. Its totient is φ = 128259936.

The previous prime is 256642051. The next prime is 256642117. The reversal of 256642052 is 250246652.

It can be written as a sum of positive squares in 2 ways, for example, as 45346756 + 211295296 = 6734^2 + 14536^2 .

It is not an unprimeable number, because it can be changed into a prime (256642051) 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, 5063 + ... + 23214.

It is an arithmetic number, because the mean of its divisors is an integer number (37444785).

Almost surely, 2^256642052 is an apocalyptic number.

It is an amenable number.

256642052 is a deficient number, since it is larger than the sum of its proper divisors (192695368).

256642052 is a wasteful number, since it uses less digits than its factorization.

256642052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30550 (or 30548 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 256642052 is about 16020.0515604663. The cubic root of 256642052 is about 635.4908078466.

The spelling of 256642052 in words is "two hundred fifty-six million, six hundred forty-two thousand, fifty-two".