Is 42621 a prime number?

42 621 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 42 621 is about 206.449.

Thus, the square root of 42 621 is not an integer, and therefore 42 621 is not a square number.

The square of a number (here 42 621) is the result of the product of this number (42 621) by itself (i.e., 42 621 × 42 621); the square of 42 621 is sometimes called "raising 42 621 to the power 2", or "42 621 squared".

The square of 42 621 is 1 816 549 641 because 42 621 × 42 621 = 42 621² = 1 816 549 641.

As a consequence, 42 621 is the square root of 1 816 549 641.

42 621 is a number with 5 digits.

The multiples of 42 621 are all integers evenly divisible by 42 621, that is all numbers such that the remainder of the division by 42 621 is zero. There are infinitely many multiples of 42 621. The smallest multiples of 42 621 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 42 621 too, since 0 × 42 621 = 0
• 42 621: indeed, 42 621 is a multiple of itself, since 42 621 is evenly divisible by 42 621 (we have 42 621 / 42 621 = 1, so the remainder of this division is indeed zero)
• 85 242: indeed, 85 242 = 42 621 × 2
• 127 863: indeed, 127 863 = 42 621 × 3
• 170 484: indeed, 170 484 = 42 621 × 4
• 213 105: indeed, 213 105 = 42 621 × 5
• etc.

• Preceding numbers: …42 619, 42 620
• Following numbers: 42 622, 42 623…

Nearest numbers from 42 621

• Preceding prime number: 42 611
• Following prime number: 42 641

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• 42 621 est-il un nombre premier ?