Is 21143 a prime number?

21 143 is an odd number, because it is not evenly divisible by 2.

Find out more:

• 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 21 143 is about 145.406.

Thus, the square root of 21 143 is not an integer, and therefore 21 143 is not a square number.

Anyway, 21 143 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 21 143) is the result of the product of this number (21 143) by itself (i.e., 21 143 × 21 143); the square of 21 143 is sometimes called "raising 21 143 to the power 2", or "21 143 squared".

The square of 21 143 is 447 026 449 because 21 143 × 21 143 = 21 143² = 447 026 449.

As a consequence, 21 143 is the square root of 447 026 449.

21 143 is a number with 5 digits.

The multiples of 21 143 are all integers evenly divisible by 21 143, that is all numbers such that the remainder of the division by 21 143 is zero. There are infinitely many multiples of 21 143. The smallest multiples of 21 143 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 143 too, since 0 × 21 143 = 0
• 21 143: indeed, 21 143 is a multiple of itself, since 21 143 is evenly divisible by 21 143 (we have 21 143 / 21 143 = 1, so the remainder of this division is indeed zero)
• 42 286: indeed, 42 286 = 21 143 × 2
• 63 429: indeed, 63 429 = 21 143 × 3
• 84 572: indeed, 84 572 = 21 143 × 4
• 105 715: indeed, 105 715 = 21 143 × 5
• etc.

• Preceding numbers: …21 141, 21 142
• Following numbers: 21 144, 21 145…

Nearest numbers from 21 143

• Preceding prime number: 21 139
• Following prime number: 21 149

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• 21 143 est-il un nombre premier ?