7397421 has 8 divisors (see below), whose sum is σ = 10292160. Its totient is φ = 4717152.

The previous prime is 7397399. The next prime is 7397443. The reversal of 7397421 is 1247937.

It is an interprime number because it is at equal distance from previous prime (7397399) and next prime (7397443).

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

It is not a de Polignac number, because 7397421 - 2⁵ = 7397389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7397461) 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, 53536 + ... + 53673.

It is an arithmetic number, because the mean of its divisors is an integer number (1286520).

Almost surely, 2^7397421 is an apocalyptic number.

It is an amenable number.

7397421 is a deficient number, since it is larger than the sum of its proper divisors (2894739).

7397421 is a wasteful number, since it uses less digits than its factorization.

7397421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107235.

The product of its digits is 10584, while the sum is 33.

The square root of 7397421 is about 2719.8200308109. The cubic root of 7397421 is about 194.8468751871.

Subtracting from 7397421 its product of digits (10584), we obtain a palindrome (7386837).

The spelling of 7397421 in words is "seven million, three hundred ninety-seven thousand, four hundred twenty-one".