7473421 has 4 divisors (see below), whose sum is σ = 7913052. Its totient is φ = 7033792.

The previous prime is 7473397. The next prime is 7473451. The reversal of 7473421 is 1243747.

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 6817321 + 656100 = 2611^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 7473421 - 2²¹ = 5376269 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 7473421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7473451) 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, 219790 + ... + 219823.

It is an arithmetic number, because the mean of its divisors is an integer number (1978263).

Almost surely, 2^7473421 is an apocalyptic number.

It is an amenable number.

7473421 is a deficient number, since it is larger than the sum of its proper divisors (439631).

7473421 is a wasteful number, since it uses less digits than its factorization.

7473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439630.

The product of its digits is 4704, while the sum is 28.

The square root of 7473421 is about 2733.7558413289. The cubic root of 7473421 is about 195.5118788883.

The spelling of 7473421 in words is "seven million, four hundred seventy-three thousand, four hundred twenty-one".