12189656 has 8 divisors (see below), whose sum is σ = 22855620. Its totient is φ = 6094824.

The previous prime is 12189647. The next prime is 12189677. The reversal of 12189656 is 65698121.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761846 + ... + 761861.

Almost surely, 2^12189656 is an apocalyptic number.

It is an amenable number.

12189656 is a deficient number, since it is larger than the sum of its proper divisors (10665964).

12189656 is a wasteful number, since it uses less digits than its factorization.

12189656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523713 (or 1523709 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 12189656 is about 3491.3687860207. The cubic root of 12189656 is about 230.1426714055.

The spelling of 12189656 in words is "twelve million, one hundred eighty-nine thousand, six hundred fifty-six".