118815 has 12 divisors (see below), whose sum is σ = 192264. Its totient is φ = 62656.

The previous prime is 118801. The next prime is 118819. The reversal of 118815 is 518811.

118815 = T₄₉ + T₅₀ + ... + T₉₃.

It is not a de Polignac number, because 118815 - 2⁴ = 118799 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 118815.

It is not an unprimeable number, because it can be changed into a prime (118819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1291 + ... + 1379.

It is an arithmetic number, because the mean of its divisors is an integer number (16022).

2¹¹⁸⁸¹⁵ is an apocalyptic number.

118815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118815 is a deficient number, since it is larger than the sum of its proper divisors (73449).

118815 is an frugal number, since it uses more digits than its factorization.

118815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 97 counting only the distinct ones).

The product of its digits is 320, while the sum is 24.

The square root of 118815 is about 344.6955178125. The cubic root of 118815 is about 49.1613451421.

The spelling of 118815 in words is "one hundred eighteen thousand, eight hundred fifteen".