12504431 has 2 divisors, whose sum is σ = 12504432. Its totient is φ = 12504430.

The previous prime is 12504391. The next prime is 12504473. The reversal of 12504431 is 13440521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12504431 is a prime.

It is a super-2 number, since 2×12504431² = 312721589267522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12504031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252215 + 6252216.

It is an arithmetic number, because the mean of its divisors is an integer number (6252216).

Almost surely, 2^12504431 is an apocalyptic number.

12504431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12504431 is an equidigital number, since it uses as much as digits as its factorization.

12504431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 12504431 is about 3536.1604884394. The cubic root of 12504431 is about 232.1068609479.

Adding to 12504431 its reverse (13440521), we get a palindrome (25944952).

The spelling of 12504431 in words is "twelve million, five hundred four thousand, four hundred thirty-one".