12156396 has 24 divisors (see below), whose sum is σ = 32417280. Its totient is φ = 3473232.

The previous prime is 12156383. The next prime is 12156439. The reversal of 12156396 is 69365121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72276 + ... + 72443.

It is an arithmetic number, because the mean of its divisors is an integer number (1350720).

Almost surely, 2^12156396 is an apocalyptic number.

It is an amenable number.

12156396 is an abundant number, since it is smaller than the sum of its proper divisors (20260884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12156396 is a wasteful number, since it uses less digits than its factorization.

12156396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144733 (or 144731 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 12156396 is about 3486.6023575969. The cubic root of 12156396 is about 229.9331626838.

The spelling of 12156396 in words is "twelve million, one hundred fifty-six thousand, three hundred ninety-six".