111982 has 16 divisors (see below), whose sum is σ = 186480. Its totient is φ = 50112.

The previous prime is 111977. The next prime is 111997. The reversal of 111982 is 289111.

It is a plaindrome in base 6.

It is a congruent number.

It is an unprimeable number.

111982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1498 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (11655).

2¹¹¹⁹⁸² is an apocalyptic number.

111982 is a deficient number, since it is larger than the sum of its proper divisors (74498).

111982 is a wasteful number, since it uses less digits than its factorization.

111982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147.

The product of its digits is 144, while the sum is 22.

The square root of 111982 is about 334.6371168893. The cubic root of 111982 is about 48.2002628499.

The spelling of 111982 in words is "one hundred eleven thousand, nine hundred eighty-two".