7387421 has 4 divisors (see below), whose sum is σ = 7567644. Its totient is φ = 7207200.

The previous prime is 7387417. The next prime is 7387441. The reversal of 7387421 is 1247837.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 940900 + 6446521 = 970^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 7387421 - 2² = 7387417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7387411) 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, 90050 + ... + 90131.

It is an arithmetic number, because the mean of its divisors is an integer number (1891911).

Almost surely, 2^7387421 is an apocalyptic number.

It is an amenable number.

7387421 is a deficient number, since it is larger than the sum of its proper divisors (180223).

7387421 is a wasteful number, since it uses less digits than its factorization.

7387421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180222.

The product of its digits is 9408, while the sum is 32.

The square root of 7387421 is about 2717.9810521783. The cubic root of 7387421 is about 194.7590361323.

The spelling of 7387421 in words is "seven million, three hundred eighty-seven thousand, four hundred twenty-one".