252645136 has 10 divisors (see below), whose sum is σ = 489499982. Its totient is φ = 126322560.

The previous prime is 252645131. The next prime is 252645161. The reversal of 252645136 is 631546252.

It can be written as a sum of positive squares in only one way, i.e., 237776400 + 14868736 = 15420^2 + 3856^2 .

It is not an unprimeable number, because it can be changed into a prime (252645131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7895145 + ... + 7895176.

Almost surely, 2^252645136 is an apocalyptic number.

It is an amenable number.

252645136 is a deficient number, since it is larger than the sum of its proper divisors (236854846).

252645136 is a wasteful number, since it uses less digits than its factorization.

252645136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15790329 (or 15790323 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 252645136 is about 15894.8147519875. The cubic root of 252645136 is about 632.1745098396.

The spelling of 252645136 in words is "two hundred fifty-two million, six hundred forty-five thousand, one hundred thirty-six".