8421004 has 6 divisors (see below), whose sum is σ = 14736764. Its totient is φ = 4210500.

The previous prime is 8420983. The next prime is 8421041. The reversal of 8421004 is 4001248.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052622 + ... + 1052629.

Almost surely, 2^8421004 is an apocalyptic number.

It is an amenable number.

8421004 is a deficient number, since it is larger than the sum of its proper divisors (6315760).

8421004 is a wasteful number, since it uses less digits than its factorization.

8421004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105255 (or 2105253 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8421004 is about 2901.8966211773. The cubic root of 8421004 is about 203.4485619982.

The spelling of 8421004 in words is "eight million, four hundred twenty-one thousand, four".