8459421 has 16 divisors (see below), whose sum is σ = 12268224. Its totient is φ = 5163264.

The previous prime is 8459417. The next prime is 8459441. The reversal of 8459421 is 1249548.

It is not a de Polignac number, because 8459421 - 2² = 8459417 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8459441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355 + ... + 4128.

It is an arithmetic number, because the mean of its divisors is an integer number (766764).

Almost surely, 2^8459421 is an apocalyptic number.

It is an amenable number.

8459421 is a deficient number, since it is larger than the sum of its proper divisors (3808803).

8459421 is a wasteful number, since it uses less digits than its factorization.

8459421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540.

The product of its digits is 11520, while the sum is 33.

The square root of 8459421 is about 2908.5083805965. The cubic root of 8459421 is about 203.7574732226.

The spelling of 8459421 in words is "eight million, four hundred fifty-nine thousand, four hundred twenty-one".