111878 has 12 divisors (see below), whose sum is σ = 182268. Its totient is φ = 51480.

The previous prime is 111871. The next prime is 111893. The reversal of 111878 is 878111.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111871) by changing a digit.

111878 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 5 ways as a sum of consecutive naturals, for example, 173 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (15189).

2¹¹¹⁸⁷⁸ is an apocalyptic number.

111878 is a deficient number, since it is larger than the sum of its proper divisors (70390).

111878 is a wasteful number, since it uses less digits than its factorization.

111878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 346 counting only the distinct ones).

The product of its digits is 448, while the sum is 26.

The square root of 111878 is about 334.4816885870. The cubic root of 111878 is about 48.1853367011.

Adding to 111878 its reverse (878111), we get a palindrome (989989).

It can be divided in two parts, 111 and 878, that added together give a palindrome (989).

The spelling of 111878 in words is "one hundred eleven thousand, eight hundred seventy-eight".