12357431 has 2 divisors, whose sum is σ = 12357432. Its totient is φ = 12357430.

The previous prime is 12357421. The next prime is 12357461. The reversal of 12357431 is 13475321.

It is a weak prime.

It is an emirp because it is prime and its reverse (13475321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12357431 is a prime.

It is a super-2 number, since 2×12357431² = 305412201839522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12357431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12357421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6178715 + 6178716.

It is an arithmetic number, because the mean of its divisors is an integer number (6178716).

Almost surely, 2^12357431 is an apocalyptic number.

12357431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12357431 is an equidigital number, since it uses as much as digits as its factorization.

12357431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 12357431 is about 3515.3137840028. The cubic root of 12357431 is about 231.1937368845.

The spelling of 12357431 in words is "twelve million, three hundred fifty-seven thousand, four hundred thirty-one".