170745 has 8 divisors (see below), whose sum is σ = 273216. Its totient is φ = 91056.

The previous prime is 170741. The next prime is 170749. The reversal of 170745 is 547071.

It is an interprime number because it is at equal distance from previous prime (170741) and next prime (170749).

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

It is not a de Polignac number, because 170745 - 2² = 170741 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (170741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5677 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (34152).

2¹⁷⁰⁷⁴⁵ is an apocalyptic number.

170745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

170745 is a deficient number, since it is larger than the sum of its proper divisors (102471).

170745 is a wasteful number, since it uses less digits than its factorization.

170745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 170745 is about 413.2130201240. The cubic root of 170745 is about 55.4773871031.

The spelling of 170745 in words is "one hundred seventy thousand, seven hundred forty-five".