12391169 has 6 divisors (see below), whose sum is σ = 14414274. Its totient is φ = 10620960.

The previous prime is 12391163. The next prime is 12391201. The reversal of 12391169 is 96119321.

It can be written as a sum of positive squares in only one way, i.e., 8439025 + 3952144 = 2905^2 + 1988^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12391169 is a prime.

It is a super-2 number, since 2×12391169² = 307082138373122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12391163) 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, 126392 + ... + 126489.

It is an arithmetic number, because the mean of its divisors is an integer number (2402379).

Almost surely, 2^12391169 is an apocalyptic number.

It is an amenable number.

12391169 is a deficient number, since it is larger than the sum of its proper divisors (2023105).

12391169 is an equidigital number, since it uses as much as digits as its factorization.

12391169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252895 (or 252888 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 12391169 is about 3520.1092312597. The cubic root of 12391169 is about 231.4039458015.

The spelling of 12391169 in words is "twelve million, three hundred ninety-one thousand, one hundred sixty-nine".