111599 has 2 divisors, whose sum is σ = 111600. Its totient is φ = 111598.

The previous prime is 111593. The next prime is 111611. The reversal of 111599 is 995111.

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 2^k-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.

It is not a weakly prime, because it can be changed into another prime (111593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55799 + 55800.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2¹¹¹⁵⁹⁹ is an apocalyptic number.

111599 is a deficient number, since it is larger than the sum of its proper divisors (1).

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 product of its digits is 405, while the sum is 26.

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".