Is 42191 a prime number?

42 191 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 42 191 is about 205.404.

Thus, the square root of 42 191 is not an integer, and therefore 42 191 is not a square number.

The square of a number (here 42 191) is the result of the product of this number (42 191) by itself (i.e., 42 191 × 42 191); the square of 42 191 is sometimes called "raising 42 191 to the power 2", or "42 191 squared".

The square of 42 191 is 1 780 080 481 because 42 191 × 42 191 = 42 191² = 1 780 080 481.

As a consequence, 42 191 is the square root of 1 780 080 481.

42 191 is a number with 5 digits.

The multiples of 42 191 are all integers evenly divisible by 42 191, that is all numbers such that the remainder of the division by 42 191 is zero. There are infinitely many multiples of 42 191. The smallest multiples of 42 191 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 191 too, since 0 × 42 191 = 0
• 42 191: indeed, 42 191 is a multiple of itself, since 42 191 is evenly divisible by 42 191 (we have 42 191 / 42 191 = 1, so the remainder of this division is indeed zero)
• 84 382: indeed, 84 382 = 42 191 × 2
• 126 573: indeed, 126 573 = 42 191 × 3
• 168 764: indeed, 168 764 = 42 191 × 4
• 210 955: indeed, 210 955 = 42 191 × 5
• etc.

• Preceding numbers: …42 189, 42 190
• Following numbers: 42 192, 42 193…

Nearest numbers from 42 191

• Preceding prime number: 42 187
• Following prime number: 42 193

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• 42 191 est-il un nombre premier ?