Is 43721 a prime number?

43 721 is an odd number, because it is not evenly divisible by 2.

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• What is an even number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 43 721 is about 209.096.

Thus, the square root of 43 721 is not an integer, and therefore 43 721 is not a square number.

Anyway, 43 721 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 43 721) is the result of the product of this number (43 721) by itself (i.e., 43 721 × 43 721); the square of 43 721 is sometimes called "raising 43 721 to the power 2", or "43 721 squared".

The square of 43 721 is 1 911 525 841 because 43 721 × 43 721 = 43 721² = 1 911 525 841.

As a consequence, 43 721 is the square root of 1 911 525 841.

43 721 is a number with 5 digits.

The multiples of 43 721 are all integers evenly divisible by 43 721, that is all numbers such that the remainder of the division by 43 721 is zero. There are infinitely many multiples of 43 721. The smallest multiples of 43 721 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 43 721 too, since 0 × 43 721 = 0
• 43 721: indeed, 43 721 is a multiple of itself, since 43 721 is evenly divisible by 43 721 (we have 43 721 / 43 721 = 1, so the remainder of this division is indeed zero)
• 87 442: indeed, 87 442 = 43 721 × 2
• 131 163: indeed, 131 163 = 43 721 × 3
• 174 884: indeed, 174 884 = 43 721 × 4
• 218 605: indeed, 218 605 = 43 721 × 5
• etc.

• Preceding numbers: …43 719, 43 720
• Following numbers: 43 722, 43 723…

Nearest numbers from 43 721

• Preceding prime number: 43 717
• Following prime number: 43 753

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• 43 721 est-il un nombre premier ?