Is 245 a Prime Number?

Is 245 a prime number? How do you know that 245 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 245? Is 245 a prime number? "No, 245 is not a prime number." Since 245 has more than 2 factors i.e. 1, 5, 7, 35, 49, 245, it is a composite number. Let's study this in detail.

• Is 245 a prime number? - No
• Is 245 a composite number? - Yes
• Factors of 245 - 1, 5, 7, 35, 49, 245
• Prime Factors of 245 - 5, 7
• Is 245 a perfect square? - No

Is 245 a Prime Number?

No, 245 is not a prime number. The number 245 is divisible by 1, 5, 7, 35, 49, 245. For a number to be classified as a prime number, it should have exactly two factors. Since 245 has more than two factors, i.e. 1, 5, 7, 35, 49, 245, it is not a prime number.

Why is 245 not a Prime Number?

To understand whether 245 is composite or prime, it is important to find its factors.

Factors of 245: 1, 5, 7, 35, 49, 245

Since 245 has more than 2 factors, we can say that 245 is not a prime number.

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Is 245 a Composite Number?

Yes, since 245 has more than two factors i.e. 1, 5, 7, 35, 49, 245. In other words, 245 is a composite number because 245 has more than 2 factors.

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Fun Facts:

• A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 10601, 11311, 12421
• 5 is the only prime number having the last digit as 5.
• A perfect square (square number) is always a composite number.

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