159985 has 12 divisors (see below), whose sum is σ = 223668. Its totient is φ = 109536.

The previous prime is 159979. The next prime is 160001. The reversal of 159985 is 589951.

159985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 112896 = 217^2 + 336^2 .

It is not a de Polignac number, because 159985 - 2³ = 159977 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (18639).

2¹⁵⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

159985 is a deficient number, since it is larger than the sum of its proper divisors (63683).

159985 is an equidigital number, since it uses as much as digits as its factorization.

159985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 665 counting only the distinct ones).

The product of its digits is 16200, while the sum is 37.

The square root of 159985 is about 399.9812495605. The cubic root of 159985 is about 54.2866557679.

It can be divided in two parts, 15 and 9985, that added together give a 4-th power (10000 = 10⁴).

The spelling of 159985 in words is "one hundred fifty-nine thousand, nine hundred eighty-five".