12131431 has 8 divisors (see below), whose sum is σ = 13154400. Its totient is φ = 11121312.

The previous prime is 12131429. The next prime is 12131437. The reversal of 12131431 is 13413121.

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 12131431 - 2¹ = 12131429 is a prime.

It is a super-2 number, since 2×12131431² = 294343236215522, 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 (12131437) 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 7 ways as a sum of consecutive naturals, for example, 1195 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (1644300).

Almost surely, 2^12131431 is an apocalyptic number.

12131431 is a deficient number, since it is larger than the sum of its proper divisors (1022969).

12131431 is a wasteful number, since it uses less digits than its factorization.

12131431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425.

The product of its digits is 72, while the sum is 16.

The square root of 12131431 is about 3483.0203846662. The cubic root of 12131431 is about 229.7756539559.

Adding to 12131431 its reverse (13413121), we get a palindrome (25544552).

The spelling of 12131431 in words is "twelve million, one hundred thirty-one thousand, four hundred thirty-one".