12864109 has 4 divisors (see below), whose sum is σ = 12946204. Its totient is φ = 12782016.

The previous prime is 12864097. The next prime is 12864127. The reversal of 12864109 is 90146821.

It is a happy number.

12864109 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 can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 5654884 = 2685^2 + 2378^2 .

It is a cyclic number.

It is not a de Polignac number, because 12864109 - 2⁵ = 12864077 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 (12864179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40812 + ... + 41125.

It is an arithmetic number, because the mean of its divisors is an integer number (3236551).

Almost surely, 2^12864109 is an apocalyptic number.

It is an amenable number.

12864109 is a deficient number, since it is larger than the sum of its proper divisors (82095).

12864109 is an equidigital number, since it uses as much as digits as its factorization.

12864109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82094.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12864109 is about 3586.6570786737. The cubic root of 12864109 is about 234.3113018957.

The spelling of 12864109 in words is "twelve million, eight hundred sixty-four thousand, one hundred nine".