12500431025 has 6 divisors (see below), whose sum is σ = 15500534502. Its totient is φ = 10000344800.

The previous prime is 12500431003. The next prime is 12500431051. The reversal of 12500431025 is 52013400521.

It can be written as a sum of positive squares in 3 ways, for example, as 9909904 + 12490521121 = 3148^2 + 111761^2 .

It is not a de Polignac number, because 12500431025 - 2¹⁰ = 12500430001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250008596 + ... + 250008645.

It is an arithmetic number, because the mean of its divisors is an integer number (2583422417).

Almost surely, 2^12500431025 is an apocalyptic number.

It is an amenable number.

12500431025 is a deficient number, since it is larger than the sum of its proper divisors (3000103477).

12500431025 is an equidigital number, since it uses as much as digits as its factorization.

12500431025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500017251 (or 500017246 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12500431025 its reverse (52013400521), we get a palindrome (64513831546).

The spelling of 12500431025 in words is "twelve billion, five hundred million, four hundred thirty-one thousand, twenty-five".