8463421 has 4 divisors (see below), whose sum is σ = 8503744. Its totient is φ = 8423100.

The previous prime is 8463419. The next prime is 8463457. The reversal of 8463421 is 1243648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8463421 - 2¹ = 8463419 is a prime.

It is a Duffinian number.

8463421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8463421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8463461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19845 + ... + 20266.

It is an arithmetic number, because the mean of its divisors is an integer number (2125936).

Almost surely, 2^8463421 is an apocalyptic number.

It is an amenable number.

8463421 is a deficient number, since it is larger than the sum of its proper divisors (40323).

8463421 is a wasteful number, since it uses less digits than its factorization.

8463421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40322.

The product of its digits is 4608, while the sum is 28.

The square root of 8463421 is about 2909.1959370245. The cubic root of 8463421 is about 203.7895834370.

The spelling of 8463421 in words is "eight million, four hundred sixty-three thousand, four hundred twenty-one".