7221546 has 24 divisors (see below), whose sum is σ = 15905604. Its totient is φ = 2367360.

The previous prime is 7221523. The next prime is 7221547. The reversal of 7221546 is 6451227.

It can be written as a sum of positive squares in 2 ways, for example, as 7209225 + 12321 = 2685^2 + 111^2 .

It is not an unprimeable number, because it can be changed into a prime (7221547) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2191 + ... + 4386.

Almost surely, 2^7221546 is an apocalyptic number.

7221546 is an abundant number, since it is smaller than the sum of its proper divisors (8684058).

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

7221546 is a wasteful number, since it uses less digits than its factorization.

7221546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6646 (or 6643 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 7221546 is about 2687.2934339219. The cubic root of 7221546 is about 193.2903002385.

The spelling of 7221546 in words is "seven million, two hundred twenty-one thousand, five hundred forty-six".