172017 has 16 divisors (see below), whose sum is σ = 266880. Its totient is φ = 109296.

The previous prime is 172009. The next prime is 172021. The reversal of 172017 is 710271.

It is not a de Polignac number, because 172017 - 2³ = 172009 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 172017.

It is not an unprimeable number, because it can be changed into a prime (172027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (16680).

2¹⁷²⁰¹⁷ is an apocalyptic number.

It is an amenable number.

172017 is a deficient number, since it is larger than the sum of its proper divisors (94863).

172017 is a wasteful number, since it uses less digits than its factorization.

172017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 172017 is about 414.7493218801. The cubic root of 172017 is about 55.6148098154.

Adding to 172017 its reverse (710271), we get a palindrome (882288).

The spelling of 172017 in words is "one hundred seventy-two thousand, seventeen", and thus it is an iban number.