12909125 has 16 divisors (see below), whose sum is σ = 16384368. Its totient is φ = 10152000.

The previous prime is 12909109. The next prime is 12909131. The reversal of 12909125 is 52190921.

12909125 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 8 ways, for example, as 8755681 + 4153444 = 2959^2 + 2038^2 .

It is not a de Polignac number, because 12909125 - 2⁴ = 12909109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6779 + ... + 8471.

It is an arithmetic number, because the mean of its divisors is an integer number (1024023).

Almost surely, 2^12909125 is an apocalyptic number.

It is an amenable number.

12909125 is a deficient number, since it is larger than the sum of its proper divisors (3475243).

12909125 is an equidigital number, since it uses as much as digits as its factorization.

12909125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 12909125 is about 3592.9270796942. The cubic root of 12909125 is about 234.5842960068.

The spelling of 12909125 in words is "twelve million, nine hundred nine thousand, one hundred twenty-five".