12842639 has 4 divisors (see below), whose sum is σ = 12863256. Its totient is φ = 12822024.

The previous prime is 12842629. The next prime is 12842647. The reversal of 12842639 is 93624821.

12842639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12842639 - 2⁴ = 12842623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12842599 and 12842608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12842629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9344 + ... + 10629.

It is an arithmetic number, because the mean of its divisors is an integer number (3215814).

Almost surely, 2^12842639 is an apocalyptic number.

12842639 is a deficient number, since it is larger than the sum of its proper divisors (20617).

12842639 is an equidigital number, since it uses as much as digits as its factorization.

12842639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20616.

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

The square root of 12842639 is about 3583.6627910561. The cubic root of 12842639 is about 234.1808753228.

The spelling of 12842639 in words is "twelve million, eight hundred forty-two thousand, six hundred thirty-nine".