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Math and Arithmetic

Prime Numbers

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# Is 147 a prime or composite number?

## Answer

###### Wiki User

###### February 11, 2017 7:49AM

147 is a composite number. Its factors are 1, 3, 7, 21, 49, and
147.

Note that the sum of the digits of 147 is 12. If the sum of the
digits of any number is a multiple of 3, then the number has 3 as a
factor. So sine 12=4x3, we know that 147 is divisible by 3 and that
makes it composite.

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