Best Answer

The number 1 is neither prime nor composite. The numbers 25, 16, 21, and 27 are divisible by factors that are not one or the number itself. 19 is the only one that has only 1 and itself as factors, so it is a Prime number.

🙏

🤨

😮

Study guides

☆

Q: Is 1 25 16 21 27 19 a prime number?

Write your answer...

Submit

Related questions

19 is prime.

They are 13 and 19 which are prime numbers

19 and 23 are prime.

13 and 19.

19

19 and 23 are prime numbers whereas 21 is a composite number

19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.

They are 13 and 19

7 is prime.

13,19.

19

21 isn't because 7*3=21.

23 Prime numbers are odd numbers and 21=3x7

19 is prime number. 10, 21 and 62 are composite numbers.

No, they are three numbers, not one. 21 is composite.

number 21 is prime

21 is a composite number, not a prime, having prime factors 3x7.

If 1 is considered a factor, the only common factor of 21 & 19 is 1, because 19 is a prime number. I'm not sure whether 1 is considered a factor since it does not reduce the original number and it's not a prime number.

24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.

1 and 19; 19 is prime. 1, 3, 7 and 21; 3 and 7 are prime. 1 and 23; 23 is prime.

21 is composite. 19 and 23 are prime.

The prime factorization of 399 is 3 x 7 x 19. 21 wouldn't be included since it isn't a prime number.

24

38 2-19= 21

There is an infinite number of prime numbers that are greater than 21. The next prime number after 21 is 23.