Is 42209 a prime number?

42 209 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 42 209 is about 205.448.

Thus, the square root of 42 209 is not an integer, and therefore 42 209 is not a square number.

Anyway, 42 209 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 42 209) is the result of the product of this number (42 209) by itself (i.e., 42 209 × 42 209); the square of 42 209 is sometimes called "raising 42 209 to the power 2", or "42 209 squared".

The square of 42 209 is 1 781 599 681 because 42 209 × 42 209 = 42 209² = 1 781 599 681.

As a consequence, 42 209 is the square root of 1 781 599 681.

42 209 is a number with 5 digits.

The multiples of 42 209 are all integers evenly divisible by 42 209, that is all numbers such that the remainder of the division by 42 209 is zero. There are infinitely many multiples of 42 209. The smallest multiples of 42 209 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 209 too, since 0 × 42 209 = 0
• 42 209: indeed, 42 209 is a multiple of itself, since 42 209 is evenly divisible by 42 209 (we have 42 209 / 42 209 = 1, so the remainder of this division is indeed zero)
• 84 418: indeed, 84 418 = 42 209 × 2
• 126 627: indeed, 126 627 = 42 209 × 3
• 168 836: indeed, 168 836 = 42 209 × 4
• 211 045: indeed, 211 045 = 42 209 × 5
• etc.

• Preceding numbers: …42 207, 42 208
• Following numbers: 42 210, 42 211…

Nearest numbers from 42 209

• Preceding prime number: 42 197
• Following prime number: 42 221

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• 42 209 est-il un nombre premier ?