12731131 has 8 divisors (see below), whose sum is σ = 14847200. Its totient is φ = 10912104.

The previous prime is 12731129. The next prime is 12731161. The reversal of 12731131 is 13113721.

12731131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12731131 - 2¹ = 12731129 is a prime.

It is a super-2 number, since 2×12731131² = 324163393078322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12731099 and 12731108.

It is not an unprimeable number, because it can be changed into a prime (12731161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18216 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (1855900).

Almost surely, 2^12731131 is an apocalyptic number.

12731131 is a deficient number, since it is larger than the sum of its proper divisors (2116069).

12731131 is an frugal number, since it uses more digits than its factorization.

12731131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37138 (or 37124 counting only the distinct ones).

The product of its digits is 126, while the sum is 19.

The square root of 12731131 is about 3568.0710474989. The cubic root of 12731131 is about 233.5011348523.

Adding to 12731131 its reverse (13113721), we get a palindrome (25844852).

The spelling of 12731131 in words is "twelve million, seven hundred thirty-one thousand, one hundred thirty-one".