Is 42921 a prime number?

42 921 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 42 921 is about 207.174.

Thus, the square root of 42 921 is not an integer, and therefore 42 921 is not a square number.

The square of a number (here 42 921) is the result of the product of this number (42 921) by itself (i.e., 42 921 × 42 921); the square of 42 921 is sometimes called "raising 42 921 to the power 2", or "42 921 squared".

The square of 42 921 is 1 842 212 241 because 42 921 × 42 921 = 42 921² = 1 842 212 241.

As a consequence, 42 921 is the square root of 1 842 212 241.

42 921 is a number with 5 digits.

The multiples of 42 921 are all integers evenly divisible by 42 921, that is all numbers such that the remainder of the division by 42 921 is zero. There are infinitely many multiples of 42 921. The smallest multiples of 42 921 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 921 too, since 0 × 42 921 = 0
• 42 921: indeed, 42 921 is a multiple of itself, since 42 921 is evenly divisible by 42 921 (we have 42 921 / 42 921 = 1, so the remainder of this division is indeed zero)
• 85 842: indeed, 85 842 = 42 921 × 2
• 128 763: indeed, 128 763 = 42 921 × 3
• 171 684: indeed, 171 684 = 42 921 × 4
• 214 605: indeed, 214 605 = 42 921 × 5
• etc.

• Preceding numbers: …42 919, 42 920
• Following numbers: 42 922, 42 923…

Nearest numbers from 42 921

• Preceding prime number: 42 901
• Following prime number: 42 923

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• 42 921 est-il un nombre premier ?