12431357 has 2 divisors, whose sum is σ = 12431358. Its totient is φ = 12431356.

The previous prime is 12431329. The next prime is 12431387. The reversal of 12431357 is 75313421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 188356 = 3499^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 12431357 - 2²⁰ = 11382781 is a prime.

It is a super-2 number, since 2×12431357² = 309077273722898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12431317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215678 + 6215679.

It is an arithmetic number, because the mean of its divisors is an integer number (6215679).

Almost surely, 2^12431357 is an apocalyptic number.

It is an amenable number.

12431357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431357 is an equidigital number, since it uses as much as digits as its factorization.

12431357 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 12431357 is about 3525.8129559011. The cubic root of 12431357 is about 231.6538449045.

Adding to 12431357 its reverse (75313421), we get a palindrome (87744778).

The spelling of 12431357 in words is "twelve million, four hundred thirty-one thousand, three hundred fifty-seven".