12648239 has 2 divisors, whose sum is σ = 12648240. Its totient is φ = 12648238.

The previous prime is 12648173. The next prime is 12648247. The reversal of 12648239 is 93284621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12648239 - 2²⁰ = 11599663 is a prime.

It is a super-2 number, since 2×12648239² = 319955899602242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12648199 and 12648208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12648269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324119 + 6324120.

It is an arithmetic number, because the mean of its divisors is an integer number (6324120).

Almost surely, 2^12648239 is an apocalyptic number.

12648239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12648239 is an equidigital number, since it uses as much as digits as its factorization.

12648239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 12648239 is about 3556.4362780739. The cubic root of 12648239 is about 232.9932581077.

The spelling of 12648239 in words is "twelve million, six hundred forty-eight thousand, two hundred thirty-nine".