8421863 has 8 divisors (see below), whose sum is σ = 8778240. Its totient is φ = 8070840.

The previous prime is 8421857. The next prime is 8421877. The reversal of 8421863 is 3681248.

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 8421863 - 2⁶ = 8421799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2048 + ... + 4586.

It is an arithmetic number, because the mean of its divisors is an integer number (1097280).

Almost surely, 2^8421863 is an apocalyptic number.

8421863 is a deficient number, since it is larger than the sum of its proper divisors (356377).

8421863 is a wasteful number, since it uses less digits than its factorization.

8421863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677.

The product of its digits is 9216, while the sum is 32.

The square root of 8421863 is about 2902.0446240539. The cubic root of 8421863 is about 203.4554794779.

The spelling of 8421863 in words is "eight million, four hundred twenty-one thousand, eight hundred sixty-three".