7409221 has 8 divisors (see below), whose sum is σ = 7966080. Its totient is φ = 6869088.

The previous prime is 7409191. The next prime is 7409249. The reversal of 7409221 is 1229047.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7409221 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 (7409251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (995760).

Almost surely, 2^7409221 is an apocalyptic number.

It is an amenable number.

7409221 is a deficient number, since it is larger than the sum of its proper divisors (556859).

7409221 is a wasteful number, since it uses less digits than its factorization.

7409221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8363.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 7409221 is about 2721.9884276021. The cubic root of 7409221 is about 194.9504235134.

The spelling of 7409221 in words is "seven million, four hundred nine thousand, two hundred twenty-one".