12822805 has 4 divisors (see below), whose sum is σ = 15387372. Its totient is φ = 10258240.

The previous prime is 12822787. The next prime is 12822827. The reversal of 12822805 is 50822821.

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 7091569 + 5731236 = 2663^2 + 2394^2 .

It is not a de Polignac number, because 12822805 - 2¹⁷ = 12691733 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282276 + ... + 1282285.

It is an arithmetic number, because the mean of its divisors is an integer number (3846843).

Almost surely, 2^12822805 is an apocalyptic number.

It is an amenable number.

12822805 is a deficient number, since it is larger than the sum of its proper divisors (2564567).

12822805 is an equidigital number, since it uses as much as digits as its factorization.

12822805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564566.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 12822805 is about 3580.8944413372. The cubic root of 12822805 is about 234.0602579371.

The spelling of 12822805 in words is "twelve million, eight hundred twenty-two thousand, eight hundred five".