12821822 has 8 divisors (see below), whose sum is σ = 20712216. Its totient is φ = 5917752.

The previous prime is 12821803. The next prime is 12821843. The reversal of 12821822 is 22812821.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 493147 = 12821822 / (1 + 2 + 8 + 2 + 1 + 8 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 12821791 and 12821800.

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 3 ways as a sum of consecutive naturals, for example, 246548 + ... + 246599.

It is an arithmetic number, because the mean of its divisors is an integer number (2589027).

Almost surely, 2^12821822 is an apocalyptic number.

12821822 is a deficient number, since it is larger than the sum of its proper divisors (7890394).

12821822 is a wasteful number, since it uses less digits than its factorization.

12821822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493162.

The product of its digits is 1024, while the sum is 26.

The square root of 12821822 is about 3580.7571824965. The cubic root of 12821822 is about 234.0542767415.

Subtracting 12821822 from its reverse (22812821), we obtain a palindrome (9990999).

The spelling of 12821822 in words is "twelve million, eight hundred twenty-one thousand, eight hundred twenty-two".