12578839 has 30 divisors (see below), whose sum is σ = 16402656. Its totient is φ = 9631440.

The previous prime is 12578807. The next prime is 12578879. The reversal of 12578839 is 93887521.

12578839 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 12578839 - 2⁵ = 12578807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12578795 and 12578804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12578879) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 405754 + ... + 405784.

Almost surely, 2^12578839 is an apocalyptic number.

12578839 is a deficient number, since it is larger than the sum of its proper divisors (3823817).

12578839 is an frugal number, since it uses more digits than its factorization.

12578839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 51 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 12578839 is about 3546.6658991227. The cubic root of 12578839 is about 232.5663371043.

The spelling of 12578839 in words is "twelve million, five hundred seventy-eight thousand, eight hundred thirty-nine".