252788857 has 4 divisors (see below), whose sum is σ = 252992500. Its totient is φ = 252585216.

The previous prime is 252788843. The next prime is 252788917. The reversal of 252788857 is 758887252.

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 65755881 + 187032976 = 8109^2 + 13676^2 .

It is a cyclic number.

It is not a de Polignac number, because 252788857 - 2¹⁵ = 252756089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252488857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99948 + ... + 102445.

It is an arithmetic number, because the mean of its divisors is an integer number (63248125).

Almost surely, 2^252788857 is an apocalyptic number.

It is an amenable number.

252788857 is a deficient number, since it is larger than the sum of its proper divisors (203643).

252788857 is a wasteful number, since it uses less digits than its factorization.

252788857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203642.

The product of its digits is 2508800, while the sum is 52.

The square root of 252788857 is about 15899.3351118844. The cubic root of 252788857 is about 632.2943611208.

The spelling of 252788857 in words is "two hundred fifty-two million, seven hundred eighty-eight thousand, eight hundred fifty-seven".