252540404 has 12 divisors (see below), whose sum is σ = 442085700. Its totient is φ = 126230208.

The previous prime is 252540401. The next prime is 252540413. The reversal of 252540404 is 404045252.

It can be written as a sum of positive squares in 2 ways, for example, as 49420900 + 203119504 = 7030^2 + 14252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252540401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7682 + ... + 23750.

It is an arithmetic number, because the mean of its divisors is an integer number (36840475).

Almost surely, 2^252540404 is an apocalyptic number.

It is an amenable number.

252540404 is a deficient number, since it is larger than the sum of its proper divisors (189545296).

252540404 is a wasteful number, since it uses less digits than its factorization.

252540404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002 (or 20000 counting only the distinct ones).

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

The square root of 252540404 is about 15891.5198769658. The cubic root of 252540404 is about 632.0871434876.

Adding to 252540404 its reverse (404045252), we get a palindrome (656585656).

The spelling of 252540404 in words is "two hundred fifty-two million, five hundred forty thousand, four hundred four".