252401635 has 32 divisors (see below), whose sum is σ = 329624640. Its totient is φ = 184823808.

The previous prime is 252401623. The next prime is 252401647. The reversal of 252401635 is 536104252.

It is an interprime number because it is at equal distance from previous prime (252401623) and next prime (252401647).

It is a cyclic number.

It is not a de Polignac number, because 252401635 - 2⁷ = 252401507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 806239 + ... + 806551.

It is an arithmetic number, because the mean of its divisors is an integer number (10300770).

Almost surely, 2^252401635 is an apocalyptic number.

252401635 is a deficient number, since it is larger than the sum of its proper divisors (77223005).

252401635 is a wasteful number, since it uses less digits than its factorization.

252401635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 252401635 is about 15887.1531433419. The cubic root of 252401635 is about 631.9713466086.

Adding to 252401635 its reverse (536104252), we get a palindrome (788505887).

The spelling of 252401635 in words is "two hundred fifty-two million, four hundred one thousand, six hundred thirty-five".