159940 has 24 divisors (see below), whose sum is σ = 366912. Its totient is φ = 58080.

The previous prime is 159937. The next prime is 159977. The reversal of 159940 is 49951.

159940 = T₁₆₅ + T₁₆₆ + ... + T₁₇₅.

It is a junction number, because it is equal to n+sod(n) for n = 159899 and 159908.

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 7 ways as a sum of consecutive naturals, for example, 144 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (15288).

2¹⁵⁹⁹⁴⁰ is an apocalyptic number.

159940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159940 is an abundant number, since it is smaller than the sum of its proper divisors (206972).

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

159940 is a wasteful number, since it uses less digits than its factorization.

159940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 159940 is about 399.9249929674. The cubic root of 159940 is about 54.2815654394.

The spelling of 159940 in words is "one hundred fifty-nine thousand, nine hundred forty".