252420185 has 16 divisors (see below), whose sum is σ = 309854160. Its totient is φ = 197333760.

The previous prime is 252420173. The next prime is 252420209. The reversal of 252420185 is 581024252.

It can be written as a sum of positive squares in 8 ways, for example, as 16736281 + 235683904 = 4091^2 + 15352^2 .

It is not a de Polignac number, because 252420185 - 2⁶ = 252420121 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 69515 + ... + 73055.

It is an arithmetic number, because the mean of its divisors is an integer number (19365885).

Almost surely, 2^252420185 is an apocalyptic number.

It is an amenable number.

252420185 is a deficient number, since it is larger than the sum of its proper divisors (57433975).

252420185 is a wasteful number, since it uses less digits than its factorization.

252420185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 252420185 is about 15887.7369376510. The cubic root of 252420185 is about 631.9868282586.

The spelling of 252420185 in words is "two hundred fifty-two million, four hundred twenty thousand, one hundred eighty-five".