252407407405 has 4 divisors (see below), whose sum is σ = 302888888892. Its totient is φ = 201925925920.

The previous prime is 252407407349. The next prime is 252407407433. The reversal of 252407407405 is 504704704252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51256054404 + 201151353001 = 226398^2 + 448499^2 .

It is not a de Polignac number, because 252407407405 - 2¹⁹ = 252406883117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25240740736 + ... + 25240740745.

It is an arithmetic number, because the mean of its divisors is an integer number (75722222223).

Almost surely, 2^252407407405 is an apocalyptic number.

It is an amenable number.

252407407405 is a deficient number, since it is larger than the sum of its proper divisors (50481481487).

252407407405 is an equidigital number, since it uses as much as digits as its factorization.

252407407405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50481481486.

The product of its (nonzero) digits is 313600, while the sum is 40.

The spelling of 252407407405 in words is "two hundred fifty-two billion, four hundred seven million, four hundred seven thousand, four hundred five".