159729 has 8 divisors (see below), whose sum is σ = 218880. Its totient is φ = 103536.

The previous prime is 159721. The next prime is 159737. The reversal of 159729 is 927951.

It is an interprime number because it is at equal distance from previous prime (159721) and next prime (159737).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159729 - 2³ = 159721 is a prime.

159729 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 159729.

It is not an unprimeable number, because it can be changed into a prime (159721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609 + ... + 830.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

2¹⁵⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

159729 is a deficient number, since it is larger than the sum of its proper divisors (59151).

159729 is a wasteful number, since it uses less digits than its factorization.

159729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479.

The product of its digits is 5670, while the sum is 33.

The square root of 159729 is about 399.6611064389. The cubic root of 159729 is about 54.2576847120.

It can be divided in two parts, 159 and 729, that added together give a palindrome (888).

The spelling of 159729 in words is "one hundred fifty-nine thousand, seven hundred twenty-nine".