252142644 has 48 divisors (see below), whose sum is σ = 634594688. Its totient is φ = 77459328.

The previous prime is 252142633. The next prime is 252142687. The reversal of 252142644 is 446241252.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 173529 + ... + 174975.

Almost surely, 2^252142644 is an apocalyptic number.

It is an amenable number.

252142644 is an abundant number, since it is smaller than the sum of its proper divisors (382452044).

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

252142644 is a wasteful number, since it uses less digits than its factorization.

252142644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2582 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 252142644 is about 15879.0000944644. Note that the first 4 decimals coincide. The cubic root of 252142644 is about 631.7551159628.

Adding to 252142644 its reverse (446241252), we get a palindrome (698383896).

The spelling of 252142644 in words is "two hundred fifty-two million, one hundred forty-two thousand, six hundred forty-four".