111538 has 16 divisors (see below), whose sum is σ = 198144. Its totient is φ = 46080.

The previous prime is 111533. The next prime is 111539. The reversal of 111538 is 835111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111533) by changing a digit.

111538 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 7 ways as a sum of consecutive naturals, for example, 306 + ... + 562.

It is an arithmetic number, because the mean of its divisors is an integer number (12384).

111538 is a Friedman number, since it can be written as 51*3^(8-1)+1, using all its digits and the basic arithmetic operations.

2¹¹¹⁵³⁸ is an apocalyptic number.

111538 is a deficient number, since it is larger than the sum of its proper divisors (86606).

111538 is a wasteful number, since it uses less digits than its factorization.

111538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297.

The product of its digits is 120, while the sum is 19.

The square root of 111538 is about 333.9730528052. The cubic root of 111538 is about 48.1364750283.

Adding to 111538 its reverse (835111), we get a palindrome (946649).

The spelling of 111538 in words is "one hundred eleven thousand, five hundred thirty-eight".