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

Is 126 a Prime Number?

Is 126 a prime number? How do you know that 126 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 126? Is 126 a prime number? "No, 126 is not a prime number." Since 126 has more than 2 factors i.e. 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, it is a composite number. Let's study this in detail.

  • Is 126 a prime number? - No
  • Is 126 a composite number? - Yes
  • Factors of 126 - 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
  • Prime Factors of 126 - 2, 3, 7
  • Is 126 a perfect square? - No

Is 126 a Prime or Composite?

Is 126 a Prime Number?

No, 126 is not a prime number. The number 126 is divisible by 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126. For a number to be classified as a prime number, it should have exactly two factors. Since 126 has more than two factors, i.e. 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, it is not a prime number.

Is 126 a Prime Number?

Why is 126 not a Prime Number?

To understand whether 126 is prime or composite, it is important to find its factors.

Factors of 126: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126

Since 126 has more than 2 factors, we can say that 126 is not a prime number.

☛ Prime Number Calculator

Is 126 a Composite Number?

Yes, since 126 has more than two factors i.e. 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126. In other words, 126 is a composite number because 126 has more than 2 factors.

Problem Statements:

Is 126 a Prime Number? No
Is 126 a Composite Number? Yes
Square Root of 126 11.224972
Multiples of 126 126, 252, 378, 504, 630, 756, 882, 1008, 1134, 1260
Square of 126 15876
Is 126 a Perfect Cube? No
Is 126 a Perfect Square? No
Is 126 an Odd Number? No
Is 126 an Even Number? Yes
Cube Root of 126 5.01329

Fun Facts:

  • A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10601, 11311, 12421
  • 23 is the smallest prime number having consecutive digits.
  • 5 is the only prime number having the last digit as 5.

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