12129232 has 20 divisors (see below), whose sum is σ = 23559876. Its totient is φ = 6049280.

The previous prime is 12129217. The next prime is 12129233. The reversal of 12129232 is 23292121.

It can be written as a sum of positive squares in 2 ways, for example, as 1527696 + 10601536 = 1236^2 + 3256^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8232 + ... + 9592.

Almost surely, 2^12129232 is an apocalyptic number.

It is an amenable number.

12129232 is a deficient number, since it is larger than the sum of its proper divisors (11430644).

12129232 is a wasteful number, since it uses less digits than its factorization.

12129232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926 (or 1920 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 12129232 is about 3482.7046960660. The cubic root of 12129232 is about 229.7617697132.

The spelling of 12129232 in words is "twelve million, one hundred twenty-nine thousand, two hundred thirty-two".