115618 has 4 divisors (see below), whose sum is σ = 173430. Its totient is φ = 57808.

The previous prime is 115613. The next prime is 115631. The reversal of 115618 is 816511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816511 = 389 ⋅2099.

It can be written as a sum of positive squares in only one way, i.e., 100489 + 15129 = 317^2 + 123^2 .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (115613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28903 + ... + 28906.

2¹¹⁵⁶¹⁸ is an apocalyptic number.

115618 is a deficient number, since it is larger than the sum of its proper divisors (57812).

115618 is an equidigital number, since it uses as much as digits as its factorization.

115618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57811.

The product of its digits is 240, while the sum is 22.

The square root of 115618 is about 340.0264695579. The cubic root of 115618 is about 48.7163958640.

The spelling of 115618 in words is "one hundred fifteen thousand, six hundred eighteen".