252397394 has 16 divisors (see below), whose sum is σ = 388274040. Its totient is φ = 122979840.

The previous prime is 252397391. The next prime is 252397399. The reversal of 252397394 is 493793252.

252397394 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 4 ways, for example, as 246898369 + 5499025 = 15713^2 + 2345^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252397391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130982 + ... + 132894.

Almost surely, 2^252397394 is an apocalyptic number.

252397394 is a deficient number, since it is larger than the sum of its proper divisors (135876646).

252397394 is a wasteful number, since it uses less digits than its factorization.

252397394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565.

The product of its digits is 408240, while the sum is 44.

The square root of 252397394 is about 15887.0196701584. The cubic root of 252397394 is about 631.9678070046.

The spelling of 252397394 in words is "two hundred fifty-two million, three hundred ninety-seven thousand, three hundred ninety-four".