252749085 has 24 divisors (see below), whose sum is σ = 407645280. Its totient is φ = 133725600.

The previous prime is 252749071. The next prime is 252749089. The reversal of 252749085 is 580947252.

It is not a de Polignac number, because 252749085 - 2⁸ = 252748829 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252749089) 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 23 ways as a sum of consecutive naturals, for example, 341646 + ... + 342384.

It is an arithmetic number, because the mean of its divisors is an integer number (16985220).

Almost surely, 2^252749085 is an apocalyptic number.

It is an amenable number.

252749085 is a deficient number, since it is larger than the sum of its proper divisors (154896195).

252749085 is an equidigital number, since it uses as much as digits as its factorization.

252749085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 252749085 is about 15898.0843185586. The cubic root of 252749085 is about 632.2611991498.

The spelling of 252749085 in words is "two hundred fifty-two million, seven hundred forty-nine thousand, eighty-five".