75 (number)
75 is a self number because there is no integer that adds up to its own digits adds up to 75. It is the sum of the first five pentagonal numbers, and therefore a pentagonal pyramidal number, as well as a nonagonal number. As the number 75 is a composite number, it has many factors other than one and the number itself. Thus, the factors of 75 are 1, 3, 5, 15, 25 and 75. What are the Multiples of 75? So, the first 10 multiples of 75 are: 75, 150, 225, 300, 375, 450, 525, 600, 675 and 750. 75 is a multiple of 3