252645765 has 16 divisors (see below), whose sum is σ = 404654400. Its totient is φ = 134604032.

The previous prime is 252645763. The next prime is 252645781. The reversal of 252645765 is 567546252.

It is a cyclic number.

It is not a de Polignac number, because 252645765 - 2¹ = 252645763 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252645763) 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 15 ways as a sum of consecutive naturals, for example, 7021 + ... + 23549.

It is an arithmetic number, because the mean of its divisors is an integer number (25290900).

Almost surely, 2^252645765 is an apocalyptic number.

It is an amenable number.

252645765 is a deficient number, since it is larger than the sum of its proper divisors (152008635).

252645765 is a wasteful number, since it uses less digits than its factorization.

252645765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17556.

The product of its digits is 504000, while the sum is 42.

The square root of 252645765 is about 15894.8345383021. The cubic root of 252645765 is about 632.1750344719.

The spelling of 252645765 in words is "two hundred fifty-two million, six hundred forty-five thousand, seven hundred sixty-five".