Is 16421 a prime number?

16 421 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 16 421 is about 128.144.

Thus, the square root of 16 421 is not an integer, and therefore 16 421 is not a square number.

Anyway, 16 421 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 16 421) is the result of the product of this number (16 421) by itself (i.e., 16 421 × 16 421); the square of 16 421 is sometimes called "raising 16 421 to the power 2", or "16 421 squared".

The square of 16 421 is 269 649 241 because 16 421 × 16 421 = 16 421² = 269 649 241.

As a consequence, 16 421 is the square root of 269 649 241.

16 421 is a number with 5 digits.

The multiples of 16 421 are all integers evenly divisible by 16 421, that is all numbers such that the remainder of the division by 16 421 is zero. There are infinitely many multiples of 16 421. The smallest multiples of 16 421 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 16 421 too, since 0 × 16 421 = 0
• 16 421: indeed, 16 421 is a multiple of itself, since 16 421 is evenly divisible by 16 421 (we have 16 421 / 16 421 = 1, so the remainder of this division is indeed zero)
• 32 842: indeed, 32 842 = 16 421 × 2
• 49 263: indeed, 49 263 = 16 421 × 3
• 65 684: indeed, 65 684 = 16 421 × 4
• 82 105: indeed, 82 105 = 16 421 × 5
• etc.

• Preceding numbers: …16 419, 16 420
• Following numbers: 16 422, 16 423…

Nearest numbers from 16 421

• Preceding prime number: 16 417
• Following prime number: 16 427

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• 16 421 est-il un nombre premier ?