12131432 has 16 divisors (see below), whose sum is σ = 23059140. Its totient is φ = 5982336.

The previous prime is 12131429. The next prime is 12131437. The reversal of 12131432 is 23413121.

It can be written as a sum of positive squares in 2 ways, for example, as 11062276 + 1069156 = 3326^2 + 1034^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12131432.

It is not an unprimeable number, because it can be changed into a prime (12131437) 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, 9803 + ... + 10970.

Almost surely, 2^12131432 is an apocalyptic number.

It is an amenable number.

12131432 is a deficient number, since it is larger than the sum of its proper divisors (10927708).

12131432 is a wasteful number, since it uses less digits than its factorization.

12131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20852 (or 20848 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 12131432 is about 3483.0205282197. The cubic root of 12131432 is about 229.7756602694.

Adding to 12131432 its reverse (23413121), we get a palindrome (35544553).

The spelling of 12131432 in words is "twelve million, one hundred thirty-one thousand, four hundred thirty-two".