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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 161 a Prime Number?

Is 161 a prime number? A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. On the contrary, composite numbers have more than two factors. To determine if 161 is a prime number or composite, we need to divide it with numbers from 1 to 161. To find out the answer to this question "is 161 is a prime number" and to gain a detailed understanding of "how and why is 161 a prime number or a composite number?" Let's learn more.

  • Is 161 a prime number? - No
  • Is 161 a composite number? - Yes
  • Is 161 a perfect square? - No
  • Prime Factors of 161 - 7, 23
  • Factors of 161 - 1, 7, 23, 161

Is 161 a Prime or Composite?

Is 161 a Prime Number?

No, 161 is not a prime number. The number 161 is divisible by 1, 7, 23, 161. For a number to be classified as a prime number, it should have exactly two factors. Since 161 has more than two factors, i.e. 1, 7, 23, 161, it is not a prime number.

Is 161 a Prime Number?

Why is 161 not a Prime Number?

To understand whether 161 is prime or composite, it is important to find its factors.

Factors of 161: 1, 7, 23, 161

Since 161 has more than 2 factors, we can say that 161 is not a prime number.

☛ Prime Number Calculator

Is 161 a Composite Number?

Yes, since 161 has more than two factors i.e. 1, 7, 23, 161. In other words, 161 is a composite number because 161 has more than 2 factors.

Problem Statements:

Is 161 a Prime Number? No
Is 161 a Composite Number? Yes
Cube Root of 161 5.440113
Is 161 a Perfect Cube? No
Is 161 an Odd Number? Yes
Square Root of 161 12.688578
Multiples of 161 161, 322, 483, 644, 805, 966, 1127, 1288, 1449, 1610
Is 161 an Even Number? No
Square of 161 25921
Is 161 a Perfect Square? No

Fun Facts:

  • A perfect square (square number) is always a composite number.
  • 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.
  • Prime numbers greater than 5 can be represented in the form of either 6n + 1 or 6n - 1. Example - 71 is a prime number and it can be written as 71 = 6 × 12 - 1

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