Is 21601 a prime number?

21 601 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 21 601 is about 146.973.

Thus, the square root of 21 601 is not an integer, and therefore 21 601 is not a square number.

Anyway, 21 601 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 21 601) is the result of the product of this number (21 601) by itself (i.e., 21 601 × 21 601); the square of 21 601 is sometimes called "raising 21 601 to the power 2", or "21 601 squared".

The square of 21 601 is 466 603 201 because 21 601 × 21 601 = 21 601² = 466 603 201.

As a consequence, 21 601 is the square root of 466 603 201.

21 601 is a number with 5 digits.

The multiples of 21 601 are all integers evenly divisible by 21 601, that is all numbers such that the remainder of the division by 21 601 is zero. There are infinitely many multiples of 21 601. The smallest multiples of 21 601 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 601 too, since 0 × 21 601 = 0
• 21 601: indeed, 21 601 is a multiple of itself, since 21 601 is evenly divisible by 21 601 (we have 21 601 / 21 601 = 1, so the remainder of this division is indeed zero)
• 43 202: indeed, 43 202 = 21 601 × 2
• 64 803: indeed, 64 803 = 21 601 × 3
• 86 404: indeed, 86 404 = 21 601 × 4
• 108 005: indeed, 108 005 = 21 601 × 5
• etc.

• Preceding numbers: …21 599, 21 600
• Following numbers: 21 602, 21 603…

Nearest numbers from 21 601

• Preceding prime number: 21 599
• Following prime number: 21 611

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• 21 601 est-il un nombre premier ?