Is 42421 a prime number?

42 421 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 42 421 is about 205.964.

Thus, the square root of 42 421 is not an integer, and therefore 42 421 is not a square number.

The square of a number (here 42 421) is the result of the product of this number (42 421) by itself (i.e., 42 421 × 42 421); the square of 42 421 is sometimes called "raising 42 421 to the power 2", or "42 421 squared".

The square of 42 421 is 1 799 541 241 because 42 421 × 42 421 = 42 421² = 1 799 541 241.

As a consequence, 42 421 is the square root of 1 799 541 241.

42 421 is a number with 5 digits.

The multiples of 42 421 are all integers evenly divisible by 42 421, that is all numbers such that the remainder of the division by 42 421 is zero. There are infinitely many multiples of 42 421. The smallest multiples of 42 421 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 421 too, since 0 × 42 421 = 0
• 42 421: indeed, 42 421 is a multiple of itself, since 42 421 is evenly divisible by 42 421 (we have 42 421 / 42 421 = 1, so the remainder of this division is indeed zero)
• 84 842: indeed, 84 842 = 42 421 × 2
• 127 263: indeed, 127 263 = 42 421 × 3
• 169 684: indeed, 169 684 = 42 421 × 4
• 212 105: indeed, 212 105 = 42 421 × 5
• etc.

• Preceding numbers: …42 419, 42 420
• Following numbers: 42 422, 42 423…

Nearest numbers from 42 421

• Preceding prime number: 42 409
• Following prime number: 42 433

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• 42 421 est-il un nombre premier ?