118187 has 4 divisors (see below), whose sum is σ = 119880. Its totient is φ = 116496.

The previous prime is 118171. The next prime is 118189. The reversal of 118187 is 781811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781811 = 29 ⋅26959.

It is a cyclic number.

It is not a de Polignac number, because 118187 - 2⁴ = 118171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737 + ... + 882.

It is an arithmetic number, because the mean of its divisors is an integer number (29970).

2¹¹⁸¹⁸⁷ is an apocalyptic number.

118187 is a deficient number, since it is larger than the sum of its proper divisors (1693).

118187 is an equidigital number, since it uses as much as digits as its factorization.

118187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692.

The product of its digits is 448, while the sum is 26.

The square root of 118187 is about 343.7833620174. The cubic root of 118187 is about 49.0745775370.

Adding to 118187 its reverse (781811), we get a palindrome (899998).

The spelling of 118187 in words is "one hundred eighteen thousand, one hundred eighty-seven".