12639125 has 8 divisors (see below), whose sum is σ = 15773784. Its totient is φ = 10111200.

The previous prime is 12639097. The next prime is 12639127. The reversal of 12639125 is 52193621.

12639125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3452164 + 9186961 = 1858^2 + 3031^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12639125 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 (12639127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50432 + ... + 50681.

It is an arithmetic number, because the mean of its divisors is an integer number (1971723).

Almost surely, 2^12639125 is an apocalyptic number.

It is an amenable number.

12639125 is a deficient number, since it is larger than the sum of its proper divisors (3134659).

12639125 is an equidigital number, since it uses as much as digits as its factorization.

12639125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101128 (or 101118 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 12639125 is about 3555.1547083074. The cubic root of 12639125 is about 232.9372816511.

The spelling of 12639125 in words is "twelve million, six hundred thirty-nine thousand, one hundred twenty-five".