129017 has 6 divisors (see below), whose sum is σ = 150138. Its totient is φ = 110544.

The previous prime is 129011. The next prime is 129023. The reversal of 129017 is 710921.

It is an interprime number because it is at equal distance from previous prime (129011) and next prime (129023).

It can be written as a sum of positive squares in only one way, i.e., 90601 + 38416 = 301^2 + 196^2 .

It is not a de Polignac number, because 129017 - 2⁴ = 129001 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 129017.

It is not an unprimeable number, because it can be changed into a prime (129011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1268 + ... + 1365.

It is an arithmetic number, because the mean of its divisors is an integer number (25023).

2¹²⁹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

129017 is a deficient number, since it is larger than the sum of its proper divisors (21121).

129017 is an equidigital number, since it uses as much as digits as its factorization.

129017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647 (or 2640 counting only the distinct ones).

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

The square root of 129017 is about 359.1893650987. The cubic root of 129017 is about 50.5299629396.

Adding to 129017 its reverse (710921), we get a palindrome (839938).

The spelling of 129017 in words is "one hundred twenty-nine thousand, seventeen".