12312117 has 6 divisors (see below), whose sum is σ = 17784182. Its totient is φ = 8208072.

The previous prime is 12312109. The next prime is 12312119. The reversal of 12312117 is 71121321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10850436 + 1461681 = 3294^2 + 1209^2 .

It is not a de Polignac number, because 12312117 - 2³ = 12312109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12312117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 683998 + ... + 684015.

Almost surely, 2^12312117 is an apocalyptic number.

It is an amenable number.

12312117 is a deficient number, since it is larger than the sum of its proper divisors (5472065).

12312117 is a wasteful number, since it uses less digits than its factorization.

12312117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368019 (or 1368016 counting only the distinct ones).

The product of its digits is 84, while the sum is 18.

The square root of 12312117 is about 3508.8626362398. The cubic root of 12312117 is about 230.9107993146.

Adding to 12312117 its reverse (71121321), we get a palindrome (83433438).

The spelling of 12312117 in words is "twelve million, three hundred twelve thousand, one hundred seventeen".