1116209 has 2 divisors, whose sum is σ = 1116210. Its totient is φ = 1116208.

The previous prime is 1116187. The next prime is 1116223. The reversal of 1116209 is 9026111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 255025 = 928^2 + 505^2 .

It is an emirp because it is prime and its reverse (9026111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1116209 - 2¹² = 1112113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1116229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558104 + 558105.

It is an arithmetic number, because the mean of its divisors is an integer number (558105).

2^1116209 is an apocalyptic number.

It is an amenable number.

1116209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116209 is an equidigital number, since it uses as much as digits as its factorization.

1116209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1116209 is about 1056.5079270881. The cubic root of 1116209 is about 103.7325784848.

The spelling of 1116209 in words is "one million, one hundred sixteen thousand, two hundred nine".