Is 72421 a prime number?

72 421 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 72 421 is about 269.112.

Thus, the square root of 72 421 is not an integer, and therefore 72 421 is not a square number.

Anyway, 72 421 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 72 421) is the result of the product of this number (72 421) by itself (i.e., 72 421 × 72 421); the square of 72 421 is sometimes called "raising 72 421 to the power 2", or "72 421 squared".

The square of 72 421 is 5 244 801 241 because 72 421 × 72 421 = 72 421² = 5 244 801 241.

As a consequence, 72 421 is the square root of 5 244 801 241.

72 421 is a number with 5 digits.

The multiples of 72 421 are all integers evenly divisible by 72 421, that is all numbers such that the remainder of the division by 72 421 is zero. There are infinitely many multiples of 72 421. The smallest multiples of 72 421 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 72 421 too, since 0 × 72 421 = 0
• 72 421: indeed, 72 421 is a multiple of itself, since 72 421 is evenly divisible by 72 421 (we have 72 421 / 72 421 = 1, so the remainder of this division is indeed zero)
• 144 842: indeed, 144 842 = 72 421 × 2
• 217 263: indeed, 217 263 = 72 421 × 3
• 289 684: indeed, 289 684 = 72 421 × 4
• 362 105: indeed, 362 105 = 72 421 × 5
• etc.

• Preceding numbers: …72 419, 72 420
• Following numbers: 72 422, 72 423…

Nearest numbers from 72 421

• Preceding prime number: 72 383
• Following prime number: 72 431

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• 72 421 est-il un nombre premier ?