12189136 has 40 divisors (see below), whose sum is σ = 25638984. Its totient is φ = 5591040.

The previous prime is 12189097. The next prime is 12189139. The reversal of 12189136 is 63198121.

It can be written as a sum of positive squares in 4 ways, for example, as 3779136 + 8410000 = 1944^2 + 2900^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12189098 and 12189107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12189139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10606 + ... + 11698.

Almost surely, 2^12189136 is an apocalyptic number.

12189136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12189136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12819492).

12189136 is an abundant number, since it is smaller than the sum of its proper divisors (13449848).

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

12189136 is a wasteful number, since it uses less digits than its factorization.

12189136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1153 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 12189136 is about 3491.2943158663. The cubic root of 12189136 is about 230.1393987977.

The spelling of 12189136 in words is "twelve million, one hundred eighty-nine thousand, one hundred thirty-six".