1090221 has 8 divisors (see below), whose sum is σ = 1585824. Its totient is φ = 660720.

The previous prime is 1090217. The next prime is 1090241. The reversal of 1090221 is 1220901.

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 1090221 - 2² = 1090217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1090221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16486 + ... + 16551.

It is an arithmetic number, because the mean of its divisors is an integer number (198228).

2^1090221 is an apocalyptic number.

1090221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1090221 is a deficient number, since it is larger than the sum of its proper divisors (495603).

1090221 is a wasteful number, since it uses less digits than its factorization.

1090221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33051.

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

The square root of 1090221 is about 1044.1364853313. The cubic root of 1090221 is about 102.9212015536.

The spelling of 1090221 in words is "one million, ninety thousand, two hundred twenty-one".