1115 has 4 divisors (see below), whose sum is σ = 1344. Its totient is φ = 888.

The previous prime is 1109. The next prime is 1117. The reversal of 1115 is 5111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5111 = 19 ⋅269.

It is a cyclic number.

It is not a de Polignac number, because 1115 - 2⁶ = 1051 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.

It is a plaindrome in base 9, base 10, base 12, base 13, base 14 and base 16.

It is not an unprimeable number, because it can be changed into a prime (1117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107 + ... + 116.

It is an arithmetic number, because the mean of its divisors is an integer number (336).

1115 is a deficient number, since it is larger than the sum of its proper divisors (229).

1115 is an equidigital number, since it uses as much as digits as its factorization.

1115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its digits is 5, while the sum is 8.

The square root of 1115 is about 33.3916157141. The cubic root of 1115 is about 10.3695112982.

Adding to 1115 its reverse (5111), we get a palindrome (6226).

It can be divided in two parts, 111 and 5, that multiplied together give a palindrome (555).

The spelling of 1115 in words is "one thousand, one hundred fifteen".