252421132 has 24 divisors (see below), whose sum is σ = 447358464. Its totient is φ = 124612752.

The previous prime is 252421123. The next prime is 252421171. The reversal of 252421132 is 231124252.

It is a happy number.

It is a super-2 number, since 2×252421132² = 127432855760322848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156273 + ... + 157879.

It is an arithmetic number, because the mean of its divisors is an integer number (18639936).

Almost surely, 2^252421132 is an apocalyptic number.

It is an amenable number.

252421132 is a deficient number, since it is larger than the sum of its proper divisors (194937332).

252421132 is a wasteful number, since it uses less digits than its factorization.

252421132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 2083 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 252421132 is about 15887.7667404831. The cubic root of 252421132 is about 631.9876185952.

Adding to 252421132 its reverse (231124252), we get a palindrome (483545384).

The spelling of 252421132 in words is "two hundred fifty-two million, four hundred twenty-one thousand, one hundred thirty-two".