Is 1239 is a composite number or not ?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 1239 is composite or not first we have to find its factors.
Contents
Factors of 1239:
- If we have taken numbers from 1, 2, 3…for checking factors of 1239, we found that 1239 has factors 1, 3, 7, 21, 59, 177, 413 and 1239. Hence, we must say that 1239 is a composite number.
- Thus, 1239 is the composite number.
- If we multiply 1239 by 1, 2, 3 then we get the multiples of 1239 which are 1239, 2478 and so on.
1239 is a Composite number or Prime number
About the number 1239:
- 1239 has more than two factors which are 1, 3, 7, 21, 59, 177, 413 and 1239 and hence it is the composite number.
- 1239 is the odd composite number and it is not the perfect square also.
- If we divide 1239 by 1, 3, 7, 21, 59, 177, 413 and 1239 then we get remainder as zero. Hence, 1, 3, 7, 21, 59, 177, 413 and 1239 are the factors of 1239
Note:
- 1239 is not the perfect square.
- Factors of 1239: 1, 3, 7, 21, 59, 177, 413 and 1239
- Prime factors of 1239: 3, 7, 59
Conclusion:
- 1239 is the composite number which has factors 1, 3, 7, 21, 59, 177, 413 and 1239.
- And hence, 1239 is not the prime number.
Multiple Choice Questions:
1) 1239 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1239 are
a) 1
b) 3, 7, 59
c) 1, 21, 177, 413 and 1239
d) 1, 3, 7, 21, 59, 177, 413 and 1239
Ans: b) 1, 21, 177, 413 and 1239
3) 1239 is the odd composite number because
a) It has factors 1, 3, 7, 21, 59, 177, 413 and 1239
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all