Is 21061 a prime number?

21 061 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 21 061 is about 145.124.

Thus, the square root of 21 061 is not an integer, and therefore 21 061 is not a square number.

Anyway, 21 061 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 21 061) is the result of the product of this number (21 061) by itself (i.e., 21 061 × 21 061); the square of 21 061 is sometimes called "raising 21 061 to the power 2", or "21 061 squared".

The square of 21 061 is 443 565 721 because 21 061 × 21 061 = 21 061² = 443 565 721.

As a consequence, 21 061 is the square root of 443 565 721.

21 061 is a number with 5 digits.

The multiples of 21 061 are all integers evenly divisible by 21 061, that is all numbers such that the remainder of the division by 21 061 is zero. There are infinitely many multiples of 21 061. The smallest multiples of 21 061 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 061 too, since 0 × 21 061 = 0
• 21 061: indeed, 21 061 is a multiple of itself, since 21 061 is evenly divisible by 21 061 (we have 21 061 / 21 061 = 1, so the remainder of this division is indeed zero)
• 42 122: indeed, 42 122 = 21 061 × 2
• 63 183: indeed, 63 183 = 21 061 × 3
• 84 244: indeed, 84 244 = 21 061 × 4
• 105 305: indeed, 105 305 = 21 061 × 5
• etc.

• Preceding numbers: …21 059, 21 060
• Following numbers: 21 062, 21 063…

Nearest numbers from 21 061

• Preceding prime number: 21 059
• Following prime number: 21 067

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• 21 061 est-il un nombre premier ?