170172 has 36 divisors (see below), whose sum is σ = 447720. Its totient is φ = 54432.

The previous prime is 170167. The next prime is 170179. The reversal of 170172 is 271071.

170172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170172.

It is not an unprimeable number, because it can be changed into a prime (170179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 963 + ... + 1125.

2¹⁷⁰¹⁷² is an apocalyptic number.

170172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 170172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223860).

170172 is an abundant number, since it is smaller than the sum of its proper divisors (277548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170172 is a wasteful number, since it uses less digits than its factorization.

170172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 197 counting only the distinct ones).

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

The square root of 170172 is about 412.5190904673. The cubic root of 170172 is about 55.4152590393.

The spelling of 170172 in words is "one hundred seventy thousand, one hundred seventy-two", and thus it is an iban number.