256442572 has 12 divisors (see below), whose sum is σ = 448924896. Its totient is φ = 128178320.

The previous prime is 256442561. The next prime is 256442579. The reversal of 256442572 is 275244652.

It is not an unprimeable number, because it can be changed into a prime (256442579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5373 + ... + 23275.

It is an arithmetic number, because the mean of its divisors is an integer number (37410408).

Almost surely, 2^256442572 is an apocalyptic number.

It is an amenable number.

256442572 is a deficient number, since it is larger than the sum of its proper divisors (192482324).

256442572 is a wasteful number, since it uses less digits than its factorization.

256442572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21488 (or 21486 counting only the distinct ones).

The product of its digits is 134400, while the sum is 37.

The square root of 256442572 is about 16013.8244026841. The cubic root of 256442572 is about 635.3261159943.

The spelling of 256442572 in words is "two hundred fifty-six million, four hundred forty-two thousand, five hundred seventy-two".