Yes. All positive, whole numbers greater than five and ending in 0, 2, 4, 5, 6 or 8 are composite.
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60
Well, honey, to get 60 as a factor of 12345, you simply divide 12345 by 60 and you get 205. So, 60 is a factor of 12345 because 60 multiplied by 205 equals 12345. And the fancy math term for that number 205 is a quotient. Hope that clears things up for ya, sugar!
-- It ends in a 5, so 5 is a factor of it. -- The sum of its digits (15) is divisible by 3, so 3 is a factor of it. It probably has tons of other factors, but either of these is enough to prove that it's composite.
It is a composite number.
It is a composite number.