1109321 has 4 divisors (see below), whose sum is σ = 1119252. Its totient is φ = 1099392.

The previous prime is 1109309. The next prime is 1109327. The reversal of 1109321 is 1239011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1239011 = 17 ⋅72883.

It can be written as a sum of positive squares in 2 ways, for example, as 583696 + 525625 = 764^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 1109321 - 2⁶ = 1109257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1109321.

It is not an unprimeable number, because it can be changed into a prime (1109327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4796 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (279813).

2^1109321 is an apocalyptic number.

It is an amenable number.

1109321 is a deficient number, since it is larger than the sum of its proper divisors (9931).

1109321 is an equidigital number, since it uses as much as digits as its factorization.

1109321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9930.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1109321 is about 1053.2430868513. The cubic root of 1109321 is about 103.5187640527.

The spelling of 1109321 in words is "one million, one hundred nine thousand, three hundred twenty-one".