111858 has 16 divisors (see below), whose sum is σ = 227136. Its totient is φ = 36720.

The previous prime is 111857. The next prime is 111863. The reversal of 111858 is 858111.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (14196).

2¹¹¹⁸⁵⁸ is an apocalyptic number.

111858 is an abundant number, since it is smaller than the sum of its proper divisors (115278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111858 is a wasteful number, since it uses less digits than its factorization.

111858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289.

The product of its digits is 320, while the sum is 24.

The square root of 111858 is about 334.4517902479. The cubic root of 111858 is about 48.1824652275.

Adding to 111858 its reverse (858111), we get a palindrome (969969).

It can be divided in two parts, 1118 and 58, that added together give a triangular number (1176 = T₄₈).

The spelling of 111858 in words is "one hundred eleven thousand, eight hundred fifty-eight".