252390291 has 8 divisors (see below), whose sum is σ = 337032144. Its totient is φ = 168004320.

The previous prime is 252390253. The next prime is 252390311. The reversal of 252390291 is 192093252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252390291 - 2⁷ = 252390163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252390221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61656 + ... + 65621.

It is an arithmetic number, because the mean of its divisors is an integer number (42129018).

Almost surely, 2^252390291 is an apocalyptic number.

252390291 is a deficient number, since it is larger than the sum of its proper divisors (84641853).

252390291 is a wasteful number, since it uses less digits than its factorization.

252390291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127941.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 252390291 is about 15886.7961213078. The cubic root of 252390291 is about 631.9618786425.

The spelling of 252390291 in words is "two hundred fifty-two million, three hundred ninety thousand, two hundred ninety-one".