252693721 has 8 divisors (see below), whose sum is σ = 289652480. Its totient is φ = 215949888.

The previous prime is 252693713. The next prime is 252693739. The reversal of 252693721 is 127396252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252693721 - 2³ = 252693713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252690721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51201 + ... + 55918.

It is an arithmetic number, because the mean of its divisors is an integer number (36206560).

Almost surely, 2^252693721 is an apocalyptic number.

It is an amenable number.

252693721 is a deficient number, since it is larger than the sum of its proper divisors (36958759).

252693721 is a wasteful number, since it uses less digits than its factorization.

252693721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107463.

The product of its digits is 45360, while the sum is 37.

The square root of 252693721 is about 15896.3430071196. The cubic root of 252693721 is about 632.2150307463.

The spelling of 252693721 in words is "two hundred fifty-two million, six hundred ninety-three thousand, seven hundred twenty-one".