12826405 has 16 divisors (see below), whose sum is σ = 16095744. Its totient is φ = 9800640.

The previous prime is 12826397. The next prime is 12826421. The reversal of 12826405 is 50462821.

12826405 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12826405 - 2³ = 12826397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12367 + ... + 13363.

It is an arithmetic number, because the mean of its divisors is an integer number (1005984).

Almost surely, 2^12826405 is an apocalyptic number.

It is an amenable number.

12826405 is a deficient number, since it is larger than the sum of its proper divisors (3269339).

12826405 is an equidigital number, since it uses as much as digits as its factorization.

12826405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 12826405 is about 3581.3970737688. The cubic root of 12826405 is about 234.0821600114.

It can be divided in two parts, 12826 and 405, that added together give a palindrome (13231).

The spelling of 12826405 in words is "twelve million, eight hundred twenty-six thousand, four hundred five".