111866 has 4 divisors (see below), whose sum is σ = 167802. Its totient is φ = 55932.

The previous prime is 111863. The next prime is 111869. The reversal of 111866 is 668111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (111863) and next prime (111869).

It can be written as a sum of positive squares in only one way, i.e., 105625 + 6241 = 325^2 + 79^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 111866.

It is not an unprimeable number, because it can be changed into a prime (111863) by changing a digit.

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 as a sum of consecutive naturals, namely, 27965 + ... + 27968.

2¹¹¹⁸⁶⁶ is an apocalyptic number.

111866 is a deficient number, since it is larger than the sum of its proper divisors (55936).

111866 is an equidigital number, since it uses as much as digits as its factorization.

111866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55935.

The product of its digits is 288, while the sum is 23.

The square root of 111866 is about 334.4637499042. The cubic root of 111866 is about 48.1836138580.

Adding to 111866 its reverse (668111), we get a palindrome (779977).

The spelling of 111866 in words is "one hundred eleven thousand, eight hundred sixty-six".