115285 has 4 divisors (see below), whose sum is σ = 138348. Its totient is φ = 92224.

The previous prime is 115279. The next prime is 115301. The reversal of 115285 is 582511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81796 + 33489 = 286^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 115285 - 2⁹ = 114773 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11524 + ... + 11533.

It is an arithmetic number, because the mean of its divisors is an integer number (34587).

2¹¹⁵²⁸⁵ is an apocalyptic number.

It is an amenable number.

115285 is a deficient number, since it is larger than the sum of its proper divisors (23063).

115285 is an equidigital number, since it uses as much as digits as its factorization.

115285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23062.

The product of its digits is 400, while the sum is 22.

The square root of 115285 is about 339.5364487062. The cubic root of 115285 is about 48.6695803180.

Adding to 115285 its reverse (582511), we get a palindrome (697796).

It can be divided in two parts, 115 and 285, that added together give a square (400 = 20²).

The spelling of 115285 in words is "one hundred fifteen thousand, two hundred eighty-five".