111115 has 8 divisors (see below), whose sum is σ = 135648. Its totient is φ = 87360.

The previous prime is 111109. The next prime is 111119. The reversal of 111115 is 511111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111115 - 2⁹ = 110603 is a prime.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a Duffinian number.

111115 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111119) 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, 199 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (16956).

2¹¹¹¹¹⁵ is an apocalyptic number.

111115 is a deficient number, since it is larger than the sum of its proper divisors (24533).

111115 is an equidigital number, since it uses as much as digits as its factorization.

111115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 5, while the sum is 10.

The square root of 111115 is about 333.3391666156. The cubic root of 111115 is about 48.0755465452.

Adding to 111115 its reverse (511111), we get a palindrome (622226).

It can be divided in two parts, 11111 and 5, that multiplied together give a palindrome (55555).

The spelling of 111115 in words is "one hundred eleven thousand, one hundred fifteen".