252521397 has 12 divisors (see below), whose sum is σ = 364893984. Its totient is φ = 168282600.

The previous prime is 252521389. The next prime is 252521429. The reversal of 252521397 is 793125252.

It is not a de Polignac number, because 252521397 - 2³ = 252521389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252521387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35272 + ... + 41822.

It is an arithmetic number, because the mean of its divisors is an integer number (30407832).

Almost surely, 2^252521397 is an apocalyptic number.

It is an amenable number.

252521397 is a deficient number, since it is larger than the sum of its proper divisors (112372587).

252521397 is a wasteful number, since it uses less digits than its factorization.

252521397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10840 (or 10837 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 252521397 is about 15890.9218423602. The cubic root of 252521397 is about 632.0712854551.

The spelling of 252521397 in words is "two hundred fifty-two million, five hundred twenty-one thousand, three hundred ninety-seven".