12189556 has 6 divisors (see below), whose sum is σ = 21331730. Its totient is φ = 6094776.

The previous prime is 12189553. The next prime is 12189557. The reversal of 12189556 is 65598121.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 176400 = 3466^2 + 420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189553) by changing a digit.

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, 1523691 + ... + 1523698.

Almost surely, 2^12189556 is an apocalyptic number.

It is an amenable number.

12189556 is a deficient number, since it is larger than the sum of its proper divisors (9142174).

12189556 is a wasteful number, since it uses less digits than its factorization.

12189556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047393 (or 3047391 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 12189556 is about 3491.3544649606. The cubic root of 12189556 is about 230.1420420651.

The spelling of 12189556 in words is "twelve million, one hundred eighty-nine thousand, five hundred fifty-six".