12396431 has 4 divisors (see below), whose sum is σ = 12606600. Its totient is φ = 12186264.

The previous prime is 12396413. The next prime is 12396467. The reversal of 12396431 is 13469321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12396431 - 2²² = 8202127 is a prime.

It is a super-2 number, since 2×12396431² = 307343003075522, 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 = 12396394 and 12396403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12396401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104996 + ... + 105113.

It is an arithmetic number, because the mean of its divisors is an integer number (3151650).

Almost surely, 2^12396431 is an apocalyptic number.

12396431 is a deficient number, since it is larger than the sum of its proper divisors (210169).

12396431 is an equidigital number, since it uses as much as digits as its factorization.

12396431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210168.

The product of its digits is 3888, while the sum is 29.

The square root of 12396431 is about 3520.8565719154. The cubic root of 12396431 is about 231.4366969553.

The spelling of 12396431 in words is "twelve million, three hundred ninety-six thousand, four hundred thirty-one".