12818805 has 8 divisors (see below), whose sum is σ = 20510112. Its totient is φ = 6836688.

The previous prime is 12818791. The next prime is 12818807. The reversal of 12818805 is 50881821.

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

It is not a de Polignac number, because 12818805 - 2⁴ = 12818789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12818807) by changing a digit.

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, 427279 + ... + 427308.

It is an arithmetic number, because the mean of its divisors is an integer number (2563764).

Almost surely, 2^12818805 is an apocalyptic number.

12818805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12818805 is a deficient number, since it is larger than the sum of its proper divisors (7691307).

12818805 is an equidigital number, since it uses as much as digits as its factorization.

12818805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854595.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 12818805 is about 3580.3358780986. The cubic root of 12818805 is about 234.0359174905.

The spelling of 12818805 in words is "twelve million, eight hundred eighteen thousand, eight hundred five".