8421873 has 8 divisors (see below), whose sum is σ = 11256288. Its totient is φ = 5601024.

The previous prime is 8421857. The next prime is 8421877. The reversal of 8421873 is 3781248.

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

It is not a de Polignac number, because 8421873 - 2⁴ = 8421857 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 8 + 4³ + 2²³ + 1 + 8⁵ + 7³ + 3⁴ .

It is not an unprimeable number, because it can be changed into a prime (8421877) 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, 1840 + ... + 4497.

It is an arithmetic number, because the mean of its divisors is an integer number (1407036).

Almost surely, 2^8421873 is an apocalyptic number.

It is an amenable number.

8421873 is a deficient number, since it is larger than the sum of its proper divisors (2834415).

8421873 is a wasteful number, since it uses less digits than its factorization.

8421873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6783.

The product of its digits is 10752, while the sum is 33.

The square root of 8421873 is about 2902.0463469766. The cubic root of 8421873 is about 203.4555600046.

The spelling of 8421873 in words is "eight million, four hundred twenty-one thousand, eight hundred seventy-three".