252905137 has 4 divisors (see below), whose sum is σ = 253350180. Its totient is φ = 252460096.

The previous prime is 252905131. The next prime is 252905221. The reversal of 252905137 is 731509252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21986721 + 230918416 = 4689^2 + 15196^2 .

It is a cyclic number.

It is not a de Polignac number, because 252905137 - 2³ = 252905129 is a prime.

It is a super-2 number, since 2×252905137² = 127922016641977538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252905131) by changing a digit.

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, 221668 + ... + 222805.

It is an arithmetic number, because the mean of its divisors is an integer number (63337545).

Almost surely, 2^252905137 is an apocalyptic number.

It is an amenable number.

252905137 is a deficient number, since it is larger than the sum of its proper divisors (445043).

252905137 is an equidigital number, since it uses as much as digits as its factorization.

252905137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445042.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 252905137 is about 15902.9914481521. The cubic root of 252905137 is about 632.3912956651.

The spelling of 252905137 in words is "two hundred fifty-two million, nine hundred five thousand, one hundred thirty-seven".