345 is a composite number because it has more than two factors
The ISBN of Thrice Upon a Time is 978-0-345-32386.
It is: 345+167 = 512
60 less than 345 = 345 - 60 = 285
756 - 345 = 411
7
280
How about 344.11?
It is: 245+100 = 345
It is 345
Itself because 345/345 = 1
All multiples of 345, which is an infinite number.