7221073 has 4 divisors (see below), whose sum is σ = 7645860. Its totient is φ = 6796288.

The previous prime is 7221041. The next prime is 7221077. The reversal of 7221073 is 3701227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 4635409 = 1608^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221073 - 2⁵ = 7221041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7221077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212368 + ... + 212401.

It is an arithmetic number, because the mean of its divisors is an integer number (1911465).

Almost surely, 2^7221073 is an apocalyptic number.

It is an amenable number.

7221073 is a deficient number, since it is larger than the sum of its proper divisors (424787).

7221073 is a wasteful number, since it uses less digits than its factorization.

7221073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424786.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7221073 is about 2687.2054257165. The cubic root of 7221073 is about 193.2860800753.

It can be divided in two parts, 722107 and 3, that multiplied together give a triangular number (2166321 = T₂₀₈₁).

The spelling of 7221073 in words is "seven million, two hundred twenty-one thousand, seventy-three".