7221056 has 28 divisors (see below), whose sum is σ = 15174468. Its totient is φ = 3397632.

The previous prime is 7221041. The next prime is 7221077. The reversal of 7221056 is 6501227.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 4910656 = 1520^2 + 2216^2 .

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, 2231 + ... + 4406.

Almost surely, 2^7221056 is an apocalyptic number.

It is an amenable number.

7221056 is an abundant number, since it is smaller than the sum of its proper divisors (7953412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7221056 is a wasteful number, since it uses less digits than its factorization.

7221056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666 (or 6656 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 7221056 is about 2687.2022625772. The cubic root of 7221056 is about 193.2859283959.

The spelling of 7221056 in words is "seven million, two hundred twenty-one thousand, fifty-six".