12172932 has 18 divisors (see below), whose sum is σ = 30770558. Its totient is φ = 4057632.

The previous prime is 12172921. The next prime is 12172933. The reversal of 12172932 is 23927121.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 20736 = 3486^2 + 144^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 12172896 and 12172905.

It is not an unprimeable number, because it can be changed into a prime (12172933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169033 + ... + 169104.

Almost surely, 2^12172932 is an apocalyptic number.

12172932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12172932 is an abundant number, since it is smaller than the sum of its proper divisors (18597626).

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

12172932 is a wasteful number, since it uses less digits than its factorization.

12172932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338147 (or 338142 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12172932 is about 3488.9729147702. The cubic root of 12172932 is about 230.0373726290.

The spelling of 12172932 in words is "twelve million, one hundred seventy-two thousand, nine hundred thirty-two".