252240402 has 16 divisors (see below), whose sum is σ = 526415040. Its totient is φ = 80424432.

The previous prime is 252240377. The next prime is 252240421. The reversal of 252240402 is 204042252.

252240402 = 84² + 85² + ... + 911².

252240402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×252240402² = 127250440802243208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913777 + ... + 914052.

It is an arithmetic number, because the mean of its divisors is an integer number (32900940).

Almost surely, 2^252240402 is an apocalyptic number.

252240402 is an abundant number, since it is smaller than the sum of its proper divisors (274174638).

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

252240402 is a wasteful number, since it uses less digits than its factorization.

252240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827857.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 252240402 is about 15882.0780126531. The cubic root of 252240402 is about 631.8367511513.

Adding to 252240402 its reverse (204042252), we get a palindrome (456282654).

It can be divided in two parts, 2522 and 40402, that added together give a palindrome (42924).

The spelling of 252240402 in words is "two hundred fifty-two million, two hundred forty thousand, four hundred two".