A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.

Is 105 a Prime Number?

Is 105 a prime number? How do you know that 105 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 105? Is 105 a prime number? "No, 105 is not a prime number." Since 105 has more than 2 factors i.e. 1, 3, 5, 7, 15, 21, 35, 105, it is a composite number. Let's study this in detail.

  • Is 105 a prime number? - No
  • Is 105 a composite number? - Yes
  • Factors of 105 - 1, 3, 5, 7, 15, 21, 35, 105
  • Prime Factors of 105 - 3, 5, 7
  • Is 105 a perfect square? - No

Is 105 a Prime or Composite?

Is 105 a Prime Number?

No, 105 is not a prime number. The number 105 is divisible by 1, 3, 5, 7, 15, 21, 35, 105. For a number to be classified as a prime number, it should have exactly two factors. Since 105 has more than two factors, i.e. 1, 3, 5, 7, 15, 21, 35, 105, it is not a prime number.

Is 105 a Prime Number?

Why is 105 not a Prime Number?

To understand whether 105 is prime or composite, it is important to find its factors.

Factors of 105: 1, 3, 5, 7, 15, 21, 35, 105

Since 105 has more than 2 factors, we can say that 105 is not a prime number.

☛ Prime Number Calculator

Is 105 a Composite Number?

Yes, since 105 has more than two factors i.e. 1, 3, 5, 7, 15, 21, 35, 105. In other words, 105 is a composite number because 105 has more than 2 factors.

Problem Statements:

Is 105 a Prime Number? No
Is 105 a Composite Number? Yes
Multiples of 105 105, 210, 315, 420, 525, 630, 735, 840, 945, 1050
Is 105 a Perfect Square? No
Square of 105 11025
Is 105 an Even Number? No
Is 105 an Odd Number? Yes
Is 105 a Perfect Cube? No
Square Root of 105 10.246951
Cube Root of 105 4.717687

Fun Facts:

  • 1 is neither prime nor composite.
  • Numbers X and Y are said to be coprime if they have only one common factor that is 1.
  • A perfect square (square number) is always a composite number.

☛ Also Check:

 
Math worksheets and
visual curriculum