7221090 has 32 divisors (see below), whose sum is σ = 18351360. Its totient is φ = 1812224.

The previous prime is 7221089. The next prime is 7221101. The reversal of 7221090 is 901227.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6570 + ... + 7589.

It is an arithmetic number, because the mean of its divisors is an integer number (573480).

Almost surely, 2^7221090 is an apocalyptic number.

7221090 is an abundant number, since it is smaller than the sum of its proper divisors (11130270).

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

7221090 is a wasteful number, since it uses less digits than its factorization.

7221090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14186.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 7221090 is about 2687.2085888520. The cubic root of 7221090 is about 193.2862317546.

The spelling of 7221090 in words is "seven million, two hundred twenty-one thousand, ninety".