12813805 has 8 divisors (see below), whose sum is σ = 15420672. Its totient is φ = 10221648.

The previous prime is 12813791. The next prime is 12813833. The reversal of 12813805 is 50831821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12813805 - 2⁷ = 12813677 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 7 ways as a sum of consecutive naturals, for example, 1657 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (1927584).

Almost surely, 2^12813805 is an apocalyptic number.

It is an amenable number.

12813805 is a deficient number, since it is larger than the sum of its proper divisors (2606867).

12813805 is an equidigital number, since it uses as much as digits as its factorization.

12813805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 12813805 is about 3579.6375514848. The cubic root of 12813805 is about 234.0054848107.

The spelling of 12813805 in words is "twelve million, eight hundred thirteen thousand, eight hundred five".