7305221 has 8 divisors (see below), whose sum is σ = 9107904. Its totient is φ = 5692320.

The previous prime is 7305217. The next prime is 7305239. The reversal of 7305221 is 1225037.

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

It is a cyclic number.

It is not a de Polignac number, because 7305221 - 2² = 7305217 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7305193 and 7305202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7305241) 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, 47360 + ... + 47513.

It is an arithmetic number, because the mean of its divisors is an integer number (1138488).

Almost surely, 2^7305221 is an apocalyptic number.

It is an amenable number.

7305221 is a deficient number, since it is larger than the sum of its proper divisors (1802683).

7305221 is a wasteful number, since it uses less digits than its factorization.

7305221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94891.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 7305221 is about 2702.8172339246. The cubic root of 7305221 is about 194.0339774689.

The spelling of 7305221 in words is "seven million, three hundred five thousand, two hundred twenty-one".