8421812 has 12 divisors (see below), whose sum is σ = 16843680. Its totient is φ = 3609336.

The previous prime is 8421799. The next prime is 8421821. The reversal of 8421812 is 2181248.

8421812 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150362 + ... + 150417.

It is an arithmetic number, because the mean of its divisors is an integer number (1403640).

Almost surely, 2^8421812 is an apocalyptic number.

It is an amenable number.

8421812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421812 is a wasteful number, since it uses less digits than its factorization.

8421812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300790 (or 300788 counting only the distinct ones).

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

The square root of 8421812 is about 2902.0358371323. The cubic root of 8421812 is about 203.4550687909.

The spelling of 8421812 in words is "eight million, four hundred twenty-one thousand, eight hundred twelve".