8421273 has 32 divisors (see below), whose sum is σ = 15102720. Its totient is φ = 4527360.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421273 is 3721248.

8421273 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8421273 - 2⁵ = 8421241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8421173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1903 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (471960).

Almost surely, 2^8421273 is an apocalyptic number.

It is an amenable number.

8421273 is a deficient number, since it is larger than the sum of its proper divisors (6681447).

8421273 is a wasteful number, since it uses less digits than its factorization.

8421273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654 (or 2648 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 8421273 is about 2901.9429698049. The cubic root of 8421273 is about 203.4507282910.

The spelling of 8421273 in words is "eight million, four hundred twenty-one thousand, two hundred seventy-three".