1106209 has 4 divisors (see below), whose sum is σ = 1191316. Its totient is φ = 1021104.

The previous prime is 1106201. The next prime is 1106213. The reversal of 1106209 is 9026011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9026011 = 577 ⋅15643.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 861184 = 495^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 1106209 - 2³ = 1106201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1106201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42534 + ... + 42559.

It is an arithmetic number, because the mean of its divisors is an integer number (297829).

2^1106209 is an apocalyptic number.

It is an amenable number.

1106209 is a deficient number, since it is larger than the sum of its proper divisors (85107).

1106209 is an equidigital number, since it uses as much as digits as its factorization.

1106209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85106.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1106209 is about 1051.7647075273. The cubic root of 1106209 is about 103.4218723177.

The spelling of 1106209 in words is "one million, one hundred six thousand, two hundred nine".