252405320 has 16 divisors (see below), whose sum is σ = 567912060. Its totient is φ = 100962112.

The previous prime is 252405319. The next prime is 252405323. The reversal of 252405320 is 23504252.

It can be written as a sum of positive squares in 2 ways, for example, as 230371684 + 22033636 = 15178^2 + 4694^2 .

It is not an unprimeable number, because it can be changed into a prime (252405323) 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 in 3 ways as a sum of consecutive naturals, for example, 3155027 + ... + 3155106.

Almost surely, 2^252405320 is an apocalyptic number.

252405320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252405320 is an abundant number, since it is smaller than the sum of its proper divisors (315506740).

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

252405320 is a wasteful number, since it uses less digits than its factorization.

252405320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310144 (or 6310140 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 252405320 is about 15887.2691171265. The cubic root of 252405320 is about 631.9744221342.

Adding to 252405320 its reverse (23504252), we get a palindrome (275909572).

The spelling of 252405320 in words is "two hundred fifty-two million, four hundred five thousand, three hundred twenty".