7347221 has 4 divisors (see below), whose sum is σ = 8396832. Its totient is φ = 6297612.

The previous prime is 7347209. The next prime is 7347229. The reversal of 7347221 is 1227437.

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.

It is a cyclic number.

It is not a de Polignac number, because 7347221 - 2⁶ = 7347157 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 (7347229) 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, 524795 + ... + 524808.

It is an arithmetic number, because the mean of its divisors is an integer number (2099208).

Almost surely, 2^7347221 is an apocalyptic number.

It is an amenable number.

7347221 is a deficient number, since it is larger than the sum of its proper divisors (1049611).

7347221 is a wasteful number, since it uses less digits than its factorization.

7347221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049610.

The product of its digits is 2352, while the sum is 26.

The square root of 7347221 is about 2710.5757690941. The cubic root of 7347221 is about 194.4051211062.

The spelling of 7347221 in words is "seven million, three hundred forty-seven thousand, two hundred twenty-one".