12125665 has 16 divisors (see below), whose sum is σ = 14918400. Its totient is φ = 9459072.

The previous prime is 12125657. The next prime is 12125689. The reversal of 12125665 is 56652121.

It is a cyclic number.

It is not a de Polignac number, because 12125665 - 2³ = 12125657 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 50616 + ... + 50854.

It is an arithmetic number, because the mean of its divisors is an integer number (932400).

Almost surely, 2^12125665 is an apocalyptic number.

It is an amenable number.

12125665 is a deficient number, since it is larger than the sum of its proper divisors (2792735).

12125665 is a wasteful number, since it uses less digits than its factorization.

12125665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456.

The product of its digits is 3600, while the sum is 28.

The square root of 12125665 is about 3482.1925564219. The cubic root of 12125665 is about 229.7392445007.

Adding to 12125665 its reverse (56652121), we get a palindrome (68777786).

The spelling of 12125665 in words is "twelve million, one hundred twenty-five thousand, six hundred sixty-five".