252639205 has 16 divisors (see below), whose sum is σ = 373129344. Its totient is φ = 159912000.

The previous prime is 252639187. The next prime is 252639217. The reversal of 252639205 is 502936252.

It is a happy number.

It is not a de Polignac number, because 252639205 - 2²⁵ = 219084773 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277171 + ... + 278080.

It is an arithmetic number, because the mean of its divisors is an integer number (23320584).

Almost surely, 2^252639205 is an apocalyptic number.

It is an amenable number.

252639205 is a deficient number, since it is larger than the sum of its proper divisors (120490139).

252639205 is a wasteful number, since it uses less digits than its factorization.

252639205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555276.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 252639205 is about 15894.6281806150. The cubic root of 252639205 is about 632.1695629057.

The spelling of 252639205 in words is "two hundred fifty-two million, six hundred thirty-nine thousand, two hundred five".