159187 has 4 divisors (see below), whose sum is σ = 181936. Its totient is φ = 136440.

The previous prime is 159179. The next prime is 159191. The reversal of 159187 is 781951.

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

It is a cyclic number.

It is not a de Polignac number, because 159187 - 2³ = 159179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (159157) 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, 11364 + ... + 11377.

It is an arithmetic number, because the mean of its divisors is an integer number (45484).

2¹⁵⁹¹⁸⁷ is an apocalyptic number.

159187 is a deficient number, since it is larger than the sum of its proper divisors (22749).

159187 is an equidigital number, since it uses as much as digits as its factorization.

159187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22748.

The product of its digits is 2520, while the sum is 31.

The square root of 159187 is about 398.9824557546. The cubic root of 159187 is about 54.1962452522.

The spelling of 159187 in words is "one hundred fifty-nine thousand, one hundred eighty-seven".