111854 has 4 divisors (see below), whose sum is σ = 167784. Its totient is φ = 55926.

The previous prime is 111847. The next prime is 111857. The reversal of 111854 is 458111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458111 = 181 ⋅2531.

It is a super-2 number, since 2×111854² = 25022634632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111857) by changing a digit.

111854 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 as a sum of consecutive naturals, namely, 27962 + ... + 27965.

It is an arithmetic number, because the mean of its divisors is an integer number (41946).

2¹¹¹⁸⁵⁴ is an apocalyptic number.

111854 is a deficient number, since it is larger than the sum of its proper divisors (55930).

111854 is an equidigital number, since it uses as much as digits as its factorization.

111854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55929.

The product of its digits is 160, while the sum is 20.

The square root of 111854 is about 334.4458102593. The cubic root of 111854 is about 48.1818908917.

Adding to 111854 its reverse (458111), we get a palindrome (569965).

The spelling of 111854 in words is "one hundred eleven thousand, eight hundred fifty-four".