252405387 has 18 divisors (see below), whose sum is σ = 394790292. Its totient is φ = 155325456.

The previous prime is 252405383. The next prime is 252405437. The reversal of 252405387 is 783504252.

252405387 is a `hidden beast` number, since 2 + 524 + 0 + 53 + 87 = 666.

It is not a de Polignac number, because 252405387 - 2² = 252405383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252405383) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 81453 + ... + 84494.

It is an arithmetic number, because the mean of its divisors is an integer number (21932794).

Almost surely, 2^252405387 is an apocalyptic number.

252405387 is a deficient number, since it is larger than the sum of its proper divisors (142384905).

252405387 is a wasteful number, since it uses less digits than its factorization.

252405387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165979 (or 165963 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 252405387 is about 15887.2712257329. The cubic root of 252405387 is about 631.9744780526.

The spelling of 252405387 in words is "two hundred fifty-two million, four hundred five thousand, three hundred eighty-seven".