252405404 has 24 divisors (see below), whose sum is σ = 464032800. Its totient is φ = 119898944.

The previous prime is 252405383. The next prime is 252405437. The reversal of 252405404 is 404504252.

It is a congruent number.

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, 4502 + ... + 22914.

It is an arithmetic number, because the mean of its divisors is an integer number (19334700).

Almost surely, 2^252405404 is an apocalyptic number.

It is an amenable number.

252405404 is a deficient number, since it is larger than the sum of its proper divisors (211627396).

252405404 is a wasteful number, since it uses less digits than its factorization.

252405404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18589 (or 18587 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 252405404 is about 15887.2717607524. The cubic root of 252405404 is about 631.9744922408.

Adding to 252405404 its reverse (404504252), we get a palindrome (656909656).

The spelling of 252405404 in words is "two hundred fifty-two million, four hundred five thousand, four hundred four".