Is 21429 a prime number?

21 429 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 21 429 is about 146.386.

Thus, the square root of 21 429 is not an integer, and therefore 21 429 is not a square number.

The square of a number (here 21 429) is the result of the product of this number (21 429) by itself (i.e., 21 429 × 21 429); the square of 21 429 is sometimes called "raising 21 429 to the power 2", or "21 429 squared".

The square of 21 429 is 459 202 041 because 21 429 × 21 429 = 21 429² = 459 202 041.

As a consequence, 21 429 is the square root of 459 202 041.

21 429 is a number with 5 digits.

The multiples of 21 429 are all integers evenly divisible by 21 429, that is all numbers such that the remainder of the division by 21 429 is zero. There are infinitely many multiples of 21 429. The smallest multiples of 21 429 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 429 too, since 0 × 21 429 = 0
• 21 429: indeed, 21 429 is a multiple of itself, since 21 429 is evenly divisible by 21 429 (we have 21 429 / 21 429 = 1, so the remainder of this division is indeed zero)
• 42 858: indeed, 42 858 = 21 429 × 2
• 64 287: indeed, 64 287 = 21 429 × 3
• 85 716: indeed, 85 716 = 21 429 × 4
• 107 145: indeed, 107 145 = 21 429 × 5
• etc.

• Preceding numbers: …21 427, 21 428
• Following numbers: 21 430, 21 431…

Nearest numbers from 21 429

• Preceding prime number: 21 419
• Following prime number: 21 433

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• 21 429 est-il un nombre premier ?