8321812 has 6 divisors (see below), whose sum is σ = 14563178. Its totient is φ = 4160904.

The previous prime is 8321809. The next prime is 8321813. The reversal of 8321812 is 2181238.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 4356 = 2884^2 + 66^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8321813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040223 + ... + 1040230.

Almost surely, 2^8321812 is an apocalyptic number.

It is an amenable number.

8321812 is a deficient number, since it is larger than the sum of its proper divisors (6241366).

8321812 is a wasteful number, since it uses less digits than its factorization.

8321812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080457 (or 2080455 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 8321812 is about 2884.7551022574. The cubic root of 8321812 is about 202.6465899914.

The spelling of 8321812 in words is "eight million, three hundred twenty-one thousand, eight hundred twelve".