12132431 has 8 divisors (see below), whose sum is σ = 13326720. Its totient is φ = 10993752.

The previous prime is 12132401. The next prime is 12132443. The reversal of 12132431 is 13423121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12132431 - 2²² = 7938127 is a prime.

It is a super-2 number, since 2×12132431² = 294391763939522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12132401) 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 7 ways as a sum of consecutive naturals, for example, 13445 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (1665840).

Almost surely, 2^12132431 is an apocalyptic number.

12132431 is a deficient number, since it is larger than the sum of its proper divisors (1194289).

12132431 is a wasteful number, since it uses less digits than its factorization.

12132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27805.

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

The square root of 12132431 is about 3483.1639352749. The cubic root of 12132431 is about 229.7819672903.

Adding to 12132431 its reverse (13423121), we get a palindrome (25555552).

The spelling of 12132431 in words is "twelve million, one hundred thirty-two thousand, four hundred thirty-one".