It is a happy number.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-111599 is a prime.
It is a plaindrome in base 10.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 111599.
2111599 is an apocalyptic number.
111599 is an equidigital number, since it uses as much as digits as its factorization.
111599 is an odious number, because the sum of its binary digits is odd.
The square root of 111599 is about 334.0643650556. The cubic root of 111599 is about 48.1452486895.
The spelling of 111599 in words is "one hundred eleven thousand, five hundred ninety-nine".