12921125 has 16 divisors (see below), whose sum is σ = 18430464. Its totient is φ = 8859600.

The previous prime is 12921119. The next prime is 12921127. The reversal of 12921125 is 52112921.

12921125 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12921125 - 2⁶ = 12921061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12921125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6509 + ... + 8258.

It is an arithmetic number, because the mean of its divisors is an integer number (1151904).

Almost surely, 2^12921125 is an apocalyptic number.

It is an amenable number.

12921125 is a deficient number, since it is larger than the sum of its proper divisors (5509339).

12921125 is an equidigital number, since it uses as much as digits as its factorization.

12921125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14789 (or 14779 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 12921125 is about 3594.5966394020. The cubic root of 12921125 is about 234.6569613952.

The spelling of 12921125 in words is "twelve million, nine hundred twenty-one thousand, one hundred twenty-five".