252702491 has 4 divisors (see below), whose sum is σ = 261416400. Its totient is φ = 243988584.

The previous prime is 252702431. The next prime is 252702521. The reversal of 252702491 is 194207252.

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

It is a cyclic number.

It is not a de Polignac number, because 252702491 - 2²² = 248508187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252702431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4356911 + ... + 4356968.

It is an arithmetic number, because the mean of its divisors is an integer number (65354100).

Almost surely, 2^252702491 is an apocalyptic number.

252702491 is a deficient number, since it is larger than the sum of its proper divisors (8713909).

252702491 is an equidigital number, since it uses as much as digits as its factorization.

252702491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8713908.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 252702491 is about 15896.6188543350. The cubic root of 252702491 is about 632.2223445564. Note that the first 3 decimals are identical.

The spelling of 252702491 in words is "two hundred fifty-two million, seven hundred two thousand, four hundred ninety-one".