252421320 has 64 divisors (see below), whose sum is σ = 790197120. Its totient is φ = 64385024.

The previous prime is 252421291. The next prime is 252421331. The reversal of 252421320 is 23124252.

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, 42969 + ... + 48488.

It is an arithmetic number, because the mean of its divisors is an integer number (12346830).

Almost surely, 2^252421320 is an apocalyptic number.

252421320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252421320 is an abundant number, since it is smaller than the sum of its proper divisors (537775800).

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

252421320 is a wasteful number, since it uses less digits than its factorization.

252421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91494 (or 91490 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 252421320 is about 15887.7726569837. The cubic root of 252421320 is about 631.9877754939.

Adding to 252421320 its reverse (23124252), we get a palindrome (275545572).

It can be divided in two parts, 25242 and 1320, that added together give a palindrome (26562).

The spelling of 252421320 in words is "two hundred fifty-two million, four hundred twenty-one thousand, three hundred twenty".