12525139 has 4 divisors (see below), whose sum is σ = 13663800. Its totient is φ = 11386480.

The previous prime is 12525137. The next prime is 12525157. The reversal of 12525139 is 93152521.

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

It is a cyclic number.

It is not a de Polignac number, because 12525139 - 2¹ = 12525137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12525137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569314 + ... + 569335.

It is an arithmetic number, because the mean of its divisors is an integer number (3415950).

Almost surely, 2^12525139 is an apocalyptic number.

12525139 is a deficient number, since it is larger than the sum of its proper divisors (1138661).

12525139 is a wasteful number, since it uses less digits than its factorization.

12525139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138660.

The product of its digits is 2700, while the sum is 28.

The square root of 12525139 is about 3539.0873117232. The cubic root of 12525139 is about 232.2349173693.

The spelling of 12525139 in words is "twelve million, five hundred twenty-five thousand, one hundred thirty-nine".