8421212 has 24 divisors (see below), whose sum is σ = 15372672. Its totient is φ = 4032000.

The previous prime is 8421209. The next prime is 8421227. The reversal of 8421212 is 2121248.

It is a happy number.

8421212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13712 + ... + 14312.

It is an arithmetic number, because the mean of its divisors is an integer number (640528).

Almost surely, 2^8421212 is an apocalyptic number.

It is an amenable number.

8421212 is a deficient number, since it is larger than the sum of its proper divisors (6951460).

8421212 is a wasteful number, since it uses less digits than its factorization.

8421212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 747 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 8421212 is about 2901.9324595862. The cubic root of 8421212 is about 203.4502370539.

The spelling of 8421212 in words is "eight million, four hundred twenty-one thousand, two hundred twelve".