12709131 has 12 divisors (see below), whose sum is σ = 17251752. Its totient is φ = 8322304.

The previous prime is 12709127. The next prime is 12709141. The reversal of 12709131 is 13190721.

12709131 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 12709131 - 2² = 12709127 is a prime.

It is a super-2 number, since 2×12709131² = 323044021550322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12709121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9835 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (1437646).

Almost surely, 2^12709131 is an apocalyptic number.

12709131 is a deficient number, since it is larger than the sum of its proper divisors (4542621).

12709131 is an equidigital number, since it uses as much as digits as its factorization.

12709131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 12709131 is about 3564.9868162449. The cubic root of 12709131 is about 233.3665569472.

Adding to 12709131 its reverse (13190721), we get a palindrome (25899852).

It can be divided in two parts, 1270 and 9131, that added together give a palindrome (10401).

The spelling of 12709131 in words is "twelve million, seven hundred nine thousand, one hundred thirty-one".