7390221 has 16 divisors (see below), whose sum is σ = 10430400. Its totient is φ = 4641408.

The previous prime is 7390219. The next prime is 7390231. The reversal of 7390221 is 1220937.

It is not a de Polignac number, because 7390221 - 2¹ = 7390219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7390191 and 7390200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7390231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17865 + ... + 18273.

It is an arithmetic number, because the mean of its divisors is an integer number (651900).

Almost surely, 2^7390221 is an apocalyptic number.

It is an amenable number.

7390221 is a deficient number, since it is larger than the sum of its proper divisors (3040179).

7390221 is a wasteful number, since it uses less digits than its factorization.

7390221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 7390221 is about 2718.4960915918. The cubic root of 7390221 is about 194.7836390539.

The spelling of 7390221 in words is "seven million, three hundred ninety thousand, two hundred twenty-one".