252074138 has 4 divisors (see below), whose sum is σ = 378111210. Its totient is φ = 126037068.

The previous prime is 252074129. The next prime is 252074149. The reversal of 252074138 is 831470252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 251127409 + 946729 = 15847^2 + 973^2 .

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 as a sum of consecutive naturals, namely, 63018533 + ... + 63018536.

Almost surely, 2^252074138 is an apocalyptic number.

252074138 is a deficient number, since it is larger than the sum of its proper divisors (126037072).

252074138 is a wasteful number, since it uses less digits than its factorization.

252074138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126037071.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 252074138 is about 15876.8428221734. The cubic root of 252074138 is about 631.6978957911.

The spelling of 252074138 in words is "two hundred fifty-two million, seventy-four thousand, one hundred thirty-eight".