170920 has 16 divisors (see below), whose sum is σ = 384660. Its totient is φ = 68352.

The previous prime is 170899. The next prime is 170921. The reversal of 170920 is 29071.

170920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 164836 + 6084 = 406^2 + 78^2 .

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (170921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097 + ... + 2176.

2¹⁷⁰⁹²⁰ is an apocalyptic number.

170920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

170920 is an abundant number, since it is smaller than the sum of its proper divisors (213740).

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

170920 is a wasteful number, since it uses less digits than its factorization.

170920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284 (or 4280 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 170920 is about 413.4247210799. The cubic root of 170920 is about 55.4963339299.

Adding to 170920 its reverse (29071), we get a palindrome (199991).

The spelling of 170920 in words is "one hundred seventy thousand, nine hundred twenty".