111986 has 16 divisors (see below), whose sum is σ = 202560. Its totient is φ = 45360.

The previous prime is 111977. The next prime is 111997. The reversal of 111986 is 689111.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 111986.

It is an unprimeable number.

111986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 476.

It is an arithmetic number, because the mean of its divisors is an integer number (12660).

2¹¹¹⁹⁸⁶ is an apocalyptic number.

111986 is a deficient number, since it is larger than the sum of its proper divisors (90574).

111986 is a wasteful number, since it uses less digits than its factorization.

111986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449.

The product of its digits is 432, while the sum is 26.

The square root of 111986 is about 334.6430934593. The cubic root of 111986 is about 48.2008367479.

The spelling of 111986 in words is "one hundred eleven thousand, nine hundred eighty-six".