12166525 has 24 divisors (see below), whose sum is σ = 17717120. Its totient is φ = 8112960.

The previous prime is 12166513. The next prime is 12166529. The reversal of 12166525 is 52566121.

It is not a de Polignac number, because 12166525 - 2⁵ = 12166493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12166493 and 12166502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5536 + ... + 7414.

Almost surely, 2^12166525 is an apocalyptic number.

It is an amenable number.

12166525 is a deficient number, since it is larger than the sum of its proper divisors (5550595).

12166525 is a wasteful number, since it uses less digits than its factorization.

12166525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933 (or 1928 counting only the distinct ones).

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

The square root of 12166525 is about 3488.0546153981. The cubic root of 12166525 is about 229.9970068924.

The spelling of 12166525 in words is "twelve million, one hundred sixty-six thousand, five hundred twenty-five".