8421017 has 8 divisors (see below), whose sum is σ = 9229440. Its totient is φ = 7619760.

The previous prime is 8420983. The next prime is 8421041. The reversal of 8421017 is 7101248.

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

It is a cyclic number.

It is not a de Polignac number, because 8421017 - 2⁶ = 8420953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8420983 and 8421001.

It is not an unprimeable number, because it can be changed into a prime (8421067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848 + ... + 4190.

It is an arithmetic number, because the mean of its divisors is an integer number (1153680).

Almost surely, 2^8421017 is an apocalyptic number.

It is an amenable number.

8421017 is a deficient number, since it is larger than the sum of its proper divisors (808423).

8421017 is a wasteful number, since it uses less digits than its factorization.

8421017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 8421017 is about 2901.8988610908. The cubic root of 8421017 is about 203.4486666900.

The spelling of 8421017 in words is "eight million, four hundred twenty-one thousand, seventeen".