159920 has 20 divisors (see below), whose sum is σ = 372000. Its totient is φ = 63936.

The previous prime is 159911. The next prime is 159931. The reversal of 159920 is 29951.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 159920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920 + ... + 1079.

It is an arithmetic number, because the mean of its divisors is an integer number (18600).

2¹⁵⁹⁹²⁰ is an apocalyptic number.

159920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159920 is an abundant number, since it is smaller than the sum of its proper divisors (212080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159920 is a wasteful number, since it uses less digits than its factorization.

159920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 159920 is about 399.8999874969. The cubic root of 159920 is about 54.2793027647.

The spelling of 159920 in words is "one hundred fifty-nine thousand, nine hundred twenty".