170128 has 40 divisors (see below), whose sum is σ = 396800. Its totient is φ = 70560.

The previous prime is 170123. The next prime is 170141. The reversal of 170128 is 821071.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (170123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5473 + ... + 5503.

It is an arithmetic number, because the mean of its divisors is an integer number (9920).

2¹⁷⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 170128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198400).

170128 is an abundant number, since it is smaller than the sum of its proper divisors (226672).

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

170128 is an equidigital number, since it uses as much as digits as its factorization.

170128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 170128 is about 412.4657561544. The cubic root of 170128 is about 55.4104825355.

Adding to 170128 its reverse (821071), we get a palindrome (991199).

It can be divided in two parts, 17012 and 8, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 170128 in words is "one hundred seventy thousand, one hundred twenty-eight".