12252505421 has 32 divisors (see below), whose sum is σ = 14653094400. Its totient is φ = 10129895424.

The previous prime is 12252505417. The next prime is 12252505427. The reversal of 12252505421 is 12450525221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12252505421 - 2² = 12252505417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12252505427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1005461 + ... + 1017573.

It is an arithmetic number, because the mean of its divisors is an integer number (457909200).

Almost surely, 2^12252505421 is an apocalyptic number.

It is an amenable number.

12252505421 is a deficient number, since it is larger than the sum of its proper divisors (2400588979).

12252505421 is a wasteful number, since it uses less digits than its factorization.

12252505421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12365.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 12252505421 in words is "twelve billion, two hundred fifty-two million, five hundred five thousand, four hundred twenty-one".