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Is 1 a Prime Number?

Is 1 a prime number? How do you know that 1 is prime or composite? Let us first understand what makes a number 'prime'. If a number has only 2 factors (1 and the number itself), then it is a prime number. If the number has more than 2 factors, then it is composite. Now, what do you think of 1? Is 1 a prime number? "No, 1 is not a prime number." Since 1 has only 1 factor that is 1 itself. Let's study this in detail.

Is 1 a prime number? - No
Is 1 a composite number? - No
Is 1 a perfect square? - Yes
Factors of 1 - 1

Is 1 a Prime or Composite?

Is 1 a Prime Number?

No, 1 is not a prime number. The number 1 has only 1 factor. For a number to be classified as a prime number, it should have exactly two factors. Since 1 has less than two factors, it is not a prime number.

Is 1 a Prime Number?

Why is 1 not a Prime Number?

To understand whether 1 is prime or composite, it is important to find its factors.

Factors of 1: 1

Since 1 has less than 2 factors, we can say that 1 is not a prime number.

☛ Prime Number Calculator

1 is neither prime nor composite

Problem Statements:

Is 1 a Prime Number?	No
Is 1 a Composite Number?	No
Multiples of 1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Is 1 an Even Number?	No
Cube Root of 1	1
Square of 1	1
Square Root of 1	1
Is 1 an Odd Number?	Yes
Is 1 a Perfect Square?	Yes
Is 1 a Perfect Cube?	Yes

Fun Facts:

Euler discovered a polynomial n² + n + 41 that produces prime numbers for values of n that lie between 0 and 39 inclusive. It can generate 40 prime numbers for 0 <= n <= 39.
A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10501, 929, 12821
A perfect cube is always a composite number.

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