12579725 has 24 divisors (see below), whose sum is σ = 16213992. Its totient is φ = 9676800.

The previous prime is 12579713. The next prime is 12579737. The reversal of 12579725 is 52797521.

It is an interprime number because it is at equal distance from previous prime (12579713) and next prime (12579737).

It can be written as a sum of positive squares in 12 ways, for example, as 10278436 + 2301289 = 3206^2 + 1517^2 .

It is not a de Polignac number, because 12579725 - 2¹⁰ = 12578701 is a prime.

It is a Duffinian number.

Its product of digits (44100) is a multiple of the sum of its prime divisors (252).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111269 + ... + 111381.

It is an arithmetic number, because the mean of its divisors is an integer number (675583).

Almost surely, 2^12579725 is an apocalyptic number.

It is an amenable number.

12579725 is a deficient number, since it is larger than the sum of its proper divisors (3634267).

12579725 is a wasteful number, since it uses less digits than its factorization.

12579725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 252 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 12579725 is about 3546.7908029654. The cubic root of 12579725 is about 232.5717973045.

The spelling of 12579725 in words is "twelve million, five hundred seventy-nine thousand, seven hundred twenty-five".