12660625 has 20 divisors (see below), whose sum is σ = 16194816. Its totient is φ = 9890000.

The previous prime is 12660589. The next prime is 12660629. The reversal of 12660625 is 52606621.

It is not a de Polignac number, because 12660625 - 2⁹ = 12660113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12660593 and 12660602.

It is not an unprimeable number, because it can be changed into a prime (12660629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29160 + ... + 29590.

Almost surely, 2^12660625 is an apocalyptic number.

It is an amenable number.

12660625 is a deficient number, since it is larger than the sum of its proper divisors (3534191).

12660625 is an frugal number, since it uses more digits than its factorization.

12660625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 12660625 is about 3558.1772018830. The cubic root of 12660625 is about 233.0692874796.

The spelling of 12660625 in words is "twelve million, six hundred sixty thousand, six hundred twenty-five".