1116509 has 4 divisors (see below), whose sum is σ = 1182204. Its totient is φ = 1050816.

The previous prime is 1116499. The next prime is 1116523. The reversal of 1116509 is 9056111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9056111 = 137 ⋅66103.

It can be written as a sum of positive squares in 2 ways, for example, as 511225 + 605284 = 715^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116509 - 2¹² = 1112413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116569) 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, 32822 + ... + 32855.

It is an arithmetic number, because the mean of its divisors is an integer number (295551).

2^1116509 is an apocalyptic number.

It is an amenable number.

1116509 is a deficient number, since it is larger than the sum of its proper divisors (65695).

1116509 is an equidigital number, since it uses as much as digits as its factorization.

1116509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65694.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 1116509 is about 1056.6498947144. The cubic root of 1116509 is about 103.7418709458.

The spelling of 1116509 in words is "one million, one hundred sixteen thousand, five hundred nine".