12802639 has 4 divisors (see below), whose sum is σ = 12843856. Its totient is φ = 12761424.

The previous prime is 12802631. The next prime is 12802681. The reversal of 12802639 is 93620821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12802639 - 2³ = 12802631 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12802639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12802631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20139 + ... + 20764.

It is an arithmetic number, because the mean of its divisors is an integer number (3210964).

Almost surely, 2^12802639 is an apocalyptic number.

12802639 is a deficient number, since it is larger than the sum of its proper divisors (41217).

12802639 is an equidigital number, since it uses as much as digits as its factorization.

12802639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41216.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 12802639 is about 3578.0775564540. The cubic root of 12802639 is about 233.9374939582.

The spelling of 12802639 in words is "twelve million, eight hundred two thousand, six hundred thirty-nine".