Is 1587 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 1587 is composite or not first we have to find its factors.
Contents
Factors of 1587:
- If we have taken numbers from 1, 2, 3…for checking factors of 1587, we found that 1587 has factors 1, 3, 23, 69, 529 and 1587. Hence, we must say that 1587 is a composite number.
- Thus, 1587 is the composite number.
- If we multiply 1587 by 1, 2, 3 then we get the multiples of 1587 which are 1587, 3174 and so on.
1587 is a Composite number or Prime number
About the number 1587:
- 1587 has more than two factors which are 1, 3, 23, 69, 529 and 1587 and hence it is the composite number.
- 1587 is the odd composite number and it is not the perfect square also.
- If we divide 1587 by 1, 3, 23, 69, 529 and 1587 then we get remainder as zero. Hence, 1, 3, 23, 69, 529 and 1587 are the factors of 1587
Note:
- 1587 is not the perfect square.
- Factors of 1587: 1, 3, 23, 69, 529 and 1587
- Prime factors of 1587: 3, 23
Conclusion:
- 1587 is the composite number which has factors 1, 3, 23, 69, 529 and 1587.
- And hence, 1587 is not the prime number.
Multiple Choice Questions:
1) 1587 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 1587 are
a) 1
b) 3, 23
c) 1, 69, 529 and 1587
d) 1, 3, 23, 69, 529 and 1587
Ans: b) 1, 69, 529 and 1587
3) 1587 is the odd composite number because
a) It has factors 1, 3, 23, 69, 529 and 1587
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all