Is 42221 a prime number?

42 221 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 42 221 is about 205.477.

Thus, the square root of 42 221 is not an integer, and therefore 42 221 is not a square number.

Anyway, 42 221 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 42 221) is the result of the product of this number (42 221) by itself (i.e., 42 221 × 42 221); the square of 42 221 is sometimes called "raising 42 221 to the power 2", or "42 221 squared".

The square of 42 221 is 1 782 612 841 because 42 221 × 42 221 = 42 221² = 1 782 612 841.

As a consequence, 42 221 is the square root of 1 782 612 841.

42 221 is a number with 5 digits.

The multiples of 42 221 are all integers evenly divisible by 42 221, that is all numbers such that the remainder of the division by 42 221 is zero. There are infinitely many multiples of 42 221. The smallest multiples of 42 221 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 221 too, since 0 × 42 221 = 0
• 42 221: indeed, 42 221 is a multiple of itself, since 42 221 is evenly divisible by 42 221 (we have 42 221 / 42 221 = 1, so the remainder of this division is indeed zero)
• 84 442: indeed, 84 442 = 42 221 × 2
• 126 663: indeed, 126 663 = 42 221 × 3
• 168 884: indeed, 168 884 = 42 221 × 4
• 211 105: indeed, 211 105 = 42 221 × 5
• etc.

• Preceding numbers: …42 219, 42 220
• Following numbers: 42 222, 42 223…

Nearest numbers from 42 221

• Preceding prime number: 42 209
• Following prime number: 42 223

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• 42 221 est-il un nombre premier ?