12659399 has 4 divisors (see below), whose sum is σ = 13095960. Its totient is φ = 12222840.

The previous prime is 12659393. The next prime is 12659401. The reversal of 12659399 is 99395621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99395621 = 13 ⋅7645817.

It is a cyclic number.

It is not a de Polignac number, because 12659399 - 2¹² = 12655303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12659393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218237 + ... + 218294.

It is an arithmetic number, because the mean of its divisors is an integer number (3273990).

Almost surely, 2^12659399 is an apocalyptic number.

12659399 is a deficient number, since it is larger than the sum of its proper divisors (436561).

12659399 is an equidigital number, since it uses as much as digits as its factorization.

12659399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436560.

The product of its digits is 131220, while the sum is 44.

The square root of 12659399 is about 3558.0049184901. The cubic root of 12659399 is about 233.0617640972.

The spelling of 12659399 in words is "twelve million, six hundred fifty-nine thousand, three hundred ninety-nine".