8704421 has 4 divisors (see below), whose sum is σ = 9495744. Its totient is φ = 7913100.

The previous prime is 8704417. The next prime is 8704433. The reversal of 8704421 is 1244078.

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 8704421 - 2² = 8704417 is a prime.

It is a Duffinian 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 (8704481) 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, 395645 + ... + 395666.

It is an arithmetic number, because the mean of its divisors is an integer number (2373936).

Almost surely, 2^8704421 is an apocalyptic number.

It is an amenable number.

8704421 is a deficient number, since it is larger than the sum of its proper divisors (791323).

8704421 is a wasteful number, since it uses less digits than its factorization.

8704421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791322.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 8704421 is about 2950.3255752544. The cubic root of 8704421 is about 205.7058437113.

Adding to 8704421 its reverse (1244078), we get a palindrome (9948499).

The spelling of 8704421 in words is "eight million, seven hundred four thousand, four hundred twenty-one".