159806 has 4 divisors (see below), whose sum is σ = 239712. Its totient is φ = 79902.

The previous prime is 159799. The next prime is 159811. The reversal of 159806 is 608951.

159806 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, and also an emirpimes, since its reverse is a distinct semiprime: 608951 = 7 ⋅86993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39950 + ... + 39953.

It is an arithmetic number, because the mean of its divisors is an integer number (59928).

2¹⁵⁹⁸⁰⁶ is an apocalyptic number.

159806 is a deficient number, since it is larger than the sum of its proper divisors (79906).

159806 is an equidigital number, since it uses as much as digits as its factorization.

159806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79905.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 159806 is about 399.7574264476. The cubic root of 159806 is about 54.2664019155.

The spelling of 159806 in words is "one hundred fifty-nine thousand, eight hundred six".