12518399 has 2 divisors, whose sum is σ = 12518400. Its totient is φ = 12518398.

The previous prime is 12518383. The next prime is 12518411. The reversal of 12518399 is 99381521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12518399 - 2⁴ = 12518383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12518329) 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, 6259199 + 6259200.

It is an arithmetic number, because the mean of its divisors is an integer number (6259200).

Almost surely, 2^12518399 is an apocalyptic number.

12518399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12518399 is an equidigital number, since it uses as much as digits as its factorization.

12518399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 12518399 is about 3538.1349606820. The cubic root of 12518399 is about 232.1932533156.

The spelling of 12518399 in words is "twelve million, five hundred eighteen thousand, three hundred ninety-nine".