252756729 has 18 divisors (see below), whose sum is σ = 381664010. Its totient is φ = 161175168.

The previous prime is 252756727. The next prime is 252756761. The reversal of 252756729 is 927657252.

252756729 is a `hidden beast` number, since 2 + 527 + 56 + 72 + 9 = 666.

252756729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159441129 + 93315600 = 12627^2 + 9660^2 .

It is not a de Polignac number, because 252756729 - 2¹ = 252756727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252756727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21784 + ... + 31305.

Almost surely, 2^252756729 is an apocalyptic number.

It is an amenable number.

252756729 is a deficient number, since it is larger than the sum of its proper divisors (128907281).

252756729 is a wasteful number, since it uses less digits than its factorization.

252756729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53141 (or 53115 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 252756729 is about 15898.3247230644. The cubic root of 252756729 is about 632.2675730019.

The spelling of 252756729 in words is "two hundred fifty-two million, seven hundred fifty-six thousand, seven hundred twenty-nine".