7398921 has 8 divisors (see below), whose sum is σ = 9877984. Its totient is φ = 4926240.

The previous prime is 7398913. The next prime is 7398929. The reversal of 7398921 is 1298937.

7398921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7398913) and next prime (7398929).

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

It is not a de Polignac number, because 7398921 - 2³ = 7398913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7398921.

It is not an unprimeable number, because it can be changed into a prime (7398929) 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, 3030 + ... + 4896.

It is an arithmetic number, because the mean of its divisors is an integer number (1234748).

Almost surely, 2^7398921 is an apocalyptic number.

It is an amenable number.

7398921 is a deficient number, since it is larger than the sum of its proper divisors (2479063).

7398921 is a wasteful number, since it uses less digits than its factorization.

7398921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191.

The product of its digits is 27216, while the sum is 39.

The square root of 7398921 is about 2720.0957703728. The cubic root of 7398921 is about 194.8600442164.

The spelling of 7398921 in words is "seven million, three hundred ninety-eight thousand, nine hundred twenty-one".