7221712 has 20 divisors (see below), whose sum is σ = 14078340. Its totient is φ = 3588608.

The previous prime is 7221707. The next prime is 7221733. The reversal of 7221712 is 2171227.

It can be written as a sum of positive squares in 2 ways, for example, as 5216656 + 2005056 = 2284^2 + 1416^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464 + ... + 4072.

It is an arithmetic number, because the mean of its divisors is an integer number (703917).

Almost surely, 2^7221712 is an apocalyptic number.

It is an amenable number.

7221712 is a deficient number, since it is larger than the sum of its proper divisors (6856628).

7221712 is a wasteful number, since it uses less digits than its factorization.

7221712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790 (or 2784 counting only the distinct ones).

The product of its digits is 392, while the sum is 22.

The square root of 7221712 is about 2687.3243198393. The cubic root of 7221712 is about 193.2917812669.

Adding to 7221712 its reverse (2171227), we get a palindrome (9392939).

The spelling of 7221712 in words is "seven million, two hundred twenty-one thousand, seven hundred twelve".