12826109 has 6 divisors (see below), whose sum is σ = 13625274. Its totient is φ = 12071360.

The previous prime is 12826097. The next prime is 12826141. The reversal of 12826109 is 90162821.

It can be written as a sum of positive squares in 3 ways, for example, as 4502884 + 8323225 = 2122^2 + 2885^2 .

It is not a de Polignac number, because 12826109 - 2⁸ = 12825853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12826199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21902 + ... + 22479.

It is an arithmetic number, because the mean of its divisors is an integer number (2270879).

Almost surely, 2^12826109 is an apocalyptic number.

It is an amenable number.

12826109 is a deficient number, since it is larger than the sum of its proper divisors (799165).

12826109 is an equidigital number, since it uses as much as digits as its factorization.

12826109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44415 (or 44398 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12826109 is about 3581.3557488750. The cubic root of 12826109 is about 234.0803593288.

The spelling of 12826109 in words is "twelve million, eight hundred twenty-six thousand, one hundred nine".