170129 has 4 divisors (see below), whose sum is σ = 172980. Its totient is φ = 167280.

The previous prime is 170123. The next prime is 170141. The reversal of 170129 is 921071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921071 = 937 ⋅983.

It can be written as a sum of positive squares in 2 ways, for example, as 46225 + 123904 = 215^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 170129 - 2¹⁶ = 104593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170129.

It is not an unprimeable number, because it can be changed into a prime (170123) by changing a digit.

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, 1334 + ... + 1455.

It is an arithmetic number, because the mean of its divisors is an integer number (43245).

2¹⁷⁰¹²⁹ is an apocalyptic number.

It is an amenable number.

170129 is a deficient number, since it is larger than the sum of its proper divisors (2851).

170129 is an equidigital number, since it uses as much as digits as its factorization.

170129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 170129 is about 412.4669683744. The cubic root of 170129 is about 55.4105911016.

The spelling of 170129 in words is "one hundred seventy thousand, one hundred twenty-nine".