115081 has 4 divisors (see below), whose sum is σ = 115972. Its totient is φ = 114192.

The previous prime is 115079. The next prime is 115099. The reversal of 115081 is 180511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 33856 = 285^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 115081 - 2¹ = 115079 is a prime.

It is a super-2 number, since 2×115081² = 26487273122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210 + ... + 523.

It is an arithmetic number, because the mean of its divisors is an integer number (28993).

2¹¹⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

115081 is a deficient number, since it is larger than the sum of its proper divisors (891).

115081 is an equidigital number, since it uses as much as digits as its factorization.

115081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 115081 is about 339.2359061184. The cubic root of 115081 is about 48.6408559785.

Adding to 115081 its reverse (180511), we get a palindrome (295592).

The spelling of 115081 in words is "one hundred fifteen thousand, eighty-one".