12525254421 has 16 divisors (see below), whose sum is σ = 16770954240. Its totient is φ = 8314896240.

The previous prime is 12525254387. The next prime is 12525254429. The reversal of 12525254421 is 12445252521.

It is not a de Polignac number, because 12525254421 - 2¹⁷ = 12525123349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525254429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2308650 + ... + 2314068.

It is an arithmetic number, because the mean of its divisors is an integer number (1048184640).

Almost surely, 2^12525254421 is an apocalyptic number.

It is an amenable number.

12525254421 is a deficient number, since it is larger than the sum of its proper divisors (4245699819).

12525254421 is a wasteful number, since it uses less digits than its factorization.

12525254421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536.

The product of its digits is 32000, while the sum is 33.

The spelling of 12525254421 in words is "twelve billion, five hundred twenty-five million, two hundred fifty-four thousand, four hundred twenty-one".