1009221 has 8 divisors (see below), whose sum is σ = 1365984. Its totient is φ = 662640.

The previous prime is 1009207. The next prime is 1009237. The reversal of 1009221 is 1229001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1009221 - 2⁵ = 1009189 is a prime.

1009221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1009221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009201) 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 7 ways as a sum of consecutive naturals, for example, 2310 + ... + 2711.

It is an arithmetic number, because the mean of its divisors is an integer number (170748).

2^1009221 is an apocalyptic number.

It is an amenable number.

1009221 is a deficient number, since it is larger than the sum of its proper divisors (356763).

1009221 is an equidigital number, since it uses as much as digits as its factorization.

1009221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1009221 is about 1004.5999203663. The cubic root of 1009221 is about 100.3064267341.

The spelling of 1009221 in words is "one million, nine thousand, two hundred twenty-one".