7394221 has 4 divisors (see below), whose sum is σ = 7483392. Its totient is φ = 7305052.

The previous prime is 7394203. The next prime is 7394239. The reversal of 7394221 is 1224937.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224937 = 7 ⋅174991.

It is an interprime number because it is at equal distance from previous prime (7394203) and next prime (7394239).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7394221 is a prime.

It is an Ulam number.

It is a Duffinian number.

7394221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7394221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7394281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44461 + ... + 44626.

It is an arithmetic number, because the mean of its divisors is an integer number (1870848).

Almost surely, 2^7394221 is an apocalyptic number.

It is an amenable number.

7394221 is a deficient number, since it is larger than the sum of its proper divisors (89171).

7394221 is an equidigital number, since it uses as much as digits as its factorization.

7394221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89170.

The product of its digits is 3024, while the sum is 28.

The square root of 7394221 is about 2719.2316929603. The cubic root of 7394221 is about 194.8187753071.

The spelling of 7394221 in words is "seven million, three hundred ninety-four thousand, two hundred twenty-one".