12156425 has 12 divisors (see below), whose sum is σ = 15125520. Its totient is φ = 9691920.

The previous prime is 12156383. The next prime is 12156439. The reversal of 12156425 is 52465121.

It is not a de Polignac number, because 12156425 - 2⁸ = 12156169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12156394 and 12156403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8834 + ... + 10116.

It is an arithmetic number, because the mean of its divisors is an integer number (1260460).

Almost surely, 2^12156425 is an apocalyptic number.

It is an amenable number.

12156425 is a deficient number, since it is larger than the sum of its proper divisors (2969095).

12156425 is a wasteful number, since it uses less digits than its factorization.

12156425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1667 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 12156425 is about 3486.6065163709. The cubic root of 12156425 is about 229.9333455246.

The spelling of 12156425 in words is "twelve million, one hundred fifty-six thousand, four hundred twenty-five".