Is 12421 a prime number?

12 421 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 12 421 is about 111.450.

Thus, the square root of 12 421 is not an integer, and therefore 12 421 is not a square number.

Anyway, 12 421 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 12 421) is the result of the product of this number (12 421) by itself (i.e., 12 421 × 12 421); the square of 12 421 is sometimes called "raising 12 421 to the power 2", or "12 421 squared".

The square of 12 421 is 154 281 241 because 12 421 × 12 421 = 12 421² = 154 281 241.

As a consequence, 12 421 is the square root of 154 281 241.

12 421 is a number with 5 digits.

The multiples of 12 421 are all integers evenly divisible by 12 421, that is all numbers such that the remainder of the division by 12 421 is zero. There are infinitely many multiples of 12 421. The smallest multiples of 12 421 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 12 421 too, since 0 × 12 421 = 0
• 12 421: indeed, 12 421 is a multiple of itself, since 12 421 is evenly divisible by 12 421 (we have 12 421 / 12 421 = 1, so the remainder of this division is indeed zero)
• 24 842: indeed, 24 842 = 12 421 × 2
• 37 263: indeed, 37 263 = 12 421 × 3
• 49 684: indeed, 49 684 = 12 421 × 4
• 62 105: indeed, 62 105 = 12 421 × 5
• etc.

• Preceding numbers: …12 419, 12 420
• Following numbers: 12 422, 12 423…

Nearest numbers from 12 421

• Preceding prime number: 12 413
• Following prime number: 12 433

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• 12 421 est-il un nombre premier ?