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45 is not prime. 45 = 3 * 3 * 5
The number 45 is known to be a Prime number. This learnt in 8th grade math.
It is a composite number.

45 factors are

1,3,5,9,15,45

There are more than 2 factors.

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8y ago

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More answers

Composite
45 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.
45 is composite. It is divisible by 3, 5, and 9, which makes it composite, as well as by 1 and 45, which if alone would make it prime.

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Wiki User

8y ago
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It is a composite number because it has at least one positive factor other than one or itself.

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Wiki User

12y ago
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composite

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Wiki User

13y ago
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Is 45 a prime or composite number

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Anonymous

4y ago
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Prime

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Anonymous

4y ago
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prime

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Anonymous

4y ago
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Q: Is number 45 a prime or composite number?
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