159971 has 4 divisors (see below), whose sum is σ = 182832. Its totient is φ = 137112.

The previous prime is 159937. The next prime is 159977. The reversal of 159971 is 179951.

159971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11420 + ... + 11433.

It is an arithmetic number, because the mean of its divisors is an integer number (45708).

2¹⁵⁹⁹⁷¹ is an apocalyptic number.

159971 is a deficient number, since it is larger than the sum of its proper divisors (22861).

159971 is an equidigital number, since it uses as much as digits as its factorization.

159971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22860.

The product of its digits is 2835, while the sum is 32.

The square root of 159971 is about 399.9637483573. The cubic root of 159971 is about 54.2850722124.

The spelling of 159971 in words is "one hundred fifty-nine thousand, nine hundred seventy-one".