12786939 has 24 divisors (see below), whose sum is σ = 20537712. Its totient is φ = 7600320.

The previous prime is 12786937. The next prime is 12786947. The reversal of 12786939 is 93968721.

It is not a de Polignac number, because 12786939 - 2¹ = 12786937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12786894 and 12786903.

It is not an unprimeable number, because it can be changed into a prime (12786937) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4029 + ... + 6465.

It is an arithmetic number, because the mean of its divisors is an integer number (855738).

Almost surely, 2^12786939 is an apocalyptic number.

12786939 is a deficient number, since it is larger than the sum of its proper divisors (7750773).

12786939 is a wasteful number, since it uses less digits than its factorization.

12786939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507 (or 2504 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 12786939 is about 3575.8829678836. The cubic root of 12786939 is about 233.8418282386.

The spelling of 12786939 in words is "twelve million, seven hundred eighty-six thousand, nine hundred thirty-nine".