252121556 has 12 divisors (see below), whose sum is σ = 451473792. Its totient is φ = 123129048.

The previous prime is 252121537. The next prime is 252121567. The reversal of 252121556 is 655121252.

It is a super-2 number, since 2×252121556² = 127130557999722272, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 732740 + ... + 733083.

It is an arithmetic number, because the mean of its divisors is an integer number (37622816).

Almost surely, 2^252121556 is an apocalyptic number.

It is an amenable number.

252121556 is a deficient number, since it is larger than the sum of its proper divisors (199352236).

252121556 is a wasteful number, since it uses less digits than its factorization.

252121556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465870 (or 1465868 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 252121556 is about 15878.3360589200. The cubic root of 252121556 is about 631.7375031503.

The spelling of 252121556 in words is "two hundred fifty-two million, one hundred twenty-one thousand, five hundred fifty-six".