252406605 has 24 divisors (see below), whose sum is σ = 443905056. Its totient is φ = 122378080.

The previous prime is 252406601. The next prime is 252406607. The reversal of 252406605 is 506604252.

It is not a de Polignac number, because 252406605 - 2² = 252406601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252406601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67719 + ... + 71348.

It is an arithmetic number, because the mean of its divisors is an integer number (18496044).

Almost surely, 2^252406605 is an apocalyptic number.

It is an amenable number.

252406605 is a deficient number, since it is larger than the sum of its proper divisors (191498451).

252406605 is a wasteful number, since it uses less digits than its factorization.

252406605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139097 (or 139086 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 252406605 is about 15887.3095582606. The cubic root of 252406605 is about 631.9754945968.

The spelling of 252406605 in words is "two hundred fifty-two million, four hundred six thousand, six hundred five".