252439947 has 24 divisors (see below), whose sum is σ = 385866000. Its totient is φ = 158588928.

The previous prime is 252439933. The next prime is 252439969. The reversal of 252439947 is 749934252.

252439947 is a `hidden beast` number, since 2 + 524 + 39 + 94 + 7 = 666.

It is not a de Polignac number, because 252439947 - 2¹⁵ = 252407179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252439907) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 29179 + ... + 36827.

It is an arithmetic number, because the mean of its divisors is an integer number (16077750).

Almost surely, 2^252439947 is an apocalyptic number.

252439947 is a deficient number, since it is larger than the sum of its proper divisors (133426053).

252439947 is a wasteful number, since it uses less digits than its factorization.

252439947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7867 (or 7864 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 252439947 is about 15888.3588516876. The cubic root of 252439947 is about 632.0033205976.

The spelling of 252439947 in words is "two hundred fifty-two million, four hundred thirty-nine thousand, nine hundred forty-seven".