8421117 has 8 divisors (see below), whose sum is σ = 11440224. Its totient is φ = 5508048.

The previous prime is 8421079. The next prime is 8421143. The reversal of 8421117 is 7111248.

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

It is not a de Polignac number, because 8421117 - 2¹¹ = 8419069 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421167) 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, 26323 + ... + 26640.

It is an arithmetic number, because the mean of its divisors is an integer number (1430028).

Almost surely, 2^8421117 is an apocalyptic number.

It is an amenable number.

8421117 is a deficient number, since it is larger than the sum of its proper divisors (3019107).

8421117 is a wasteful number, since it uses less digits than its factorization.

8421117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53019.

The product of its digits is 448, while the sum is 24.

The square root of 8421117 is about 2901.9160911370. The cubic root of 8421117 is about 203.4494720079.

The spelling of 8421117 in words is "eight million, four hundred twenty-one thousand, one hundred seventeen".