12189732 has 24 divisors (see below), whose sum is σ = 29049216. Its totient is φ = 3976608.

The previous prime is 12189703. The next prime is 12189733. The reversal of 12189732 is 23798121.

It is a junction number, because it is equal to n+sod(n) for n = 12189693 and 12189702.

It is not an unprimeable number, because it can be changed into a prime (12189733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10243 + ... + 11370.

It is an arithmetic number, because the mean of its divisors is an integer number (1210384).

Almost surely, 2^12189732 is an apocalyptic number.

12189732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12189732 is an abundant number, since it is smaller than the sum of its proper divisors (16859484).

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

12189732 is a wasteful number, since it uses less digits than its factorization.

12189732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21667 (or 21665 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 12189732 is about 3491.3796699872. The cubic root of 12189732 is about 230.1431497019.

It can be divided in two parts, 12189 and 732, that added together give a palindrome (12921).

The spelling of 12189732 in words is "twelve million, one hundred eighty-nine thousand, seven hundred thirty-two".