159956 has 6 divisors (see below), whose sum is σ = 279930. Its totient is φ = 79976.

The previous prime is 159937. The next prime is 159977. The reversal of 159956 is 659951.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 48400 = 334^2 + 220^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

159956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19991 + ... + 19998.

It is an arithmetic number, because the mean of its divisors is an integer number (46655).

2¹⁵⁹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

159956 is a deficient number, since it is larger than the sum of its proper divisors (119974).

159956 is a wasteful number, since it uses less digits than its factorization.

159956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39993 (or 39991 counting only the distinct ones).

The product of its digits is 12150, while the sum is 35.

The square root of 159956 is about 399.9449962182. The cubic root of 159956 is about 54.2833754434.

The spelling of 159956 in words is "one hundred fifty-nine thousand, nine hundred fifty-six".