7373221 has 4 divisors (see below), whose sum is σ = 7627500. Its totient is φ = 7118944.

The previous prime is 7373213. The next prime is 7373227. The reversal of 7373221 is 1223737.

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 1920996 + 5452225 = 1386^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 7373221 - 2³ = 7373213 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 (7373227) 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, 127096 + ... + 127153.

It is an arithmetic number, because the mean of its divisors is an integer number (1906875).

Almost surely, 2^7373221 is an apocalyptic number.

It is an amenable number.

7373221 is a deficient number, since it is larger than the sum of its proper divisors (254279).

7373221 is a wasteful number, since it uses less digits than its factorization.

7373221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254278.

The product of its digits is 1764, while the sum is 25.

The square root of 7373221 is about 2715.3675625963. The cubic root of 7373221 is about 194.6341683698.

Adding to 7373221 its reverse (1223737), we get a palindrome (8596958).

The spelling of 7373221 in words is "seven million, three hundred seventy-three thousand, two hundred twenty-one".