Is 21400 a prime number?

21 400 is an even number, because it is evenly divisible by 2: 21 400 / 2 = 10 700.

Find out more:

• 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 21 400 is about 146.287.

Thus, the square root of 21 400 is not an integer, and therefore 21 400 is not a square number.

The square of a number (here 21 400) is the result of the product of this number (21 400) by itself (i.e., 21 400 × 21 400); the square of 21 400 is sometimes called "raising 21 400 to the power 2", or "21 400 squared".

The square of 21 400 is 457 960 000 because 21 400 × 21 400 = 21 400² = 457 960 000.

As a consequence, 21 400 is the square root of 457 960 000.

21 400 is a number with 5 digits.

The multiples of 21 400 are all integers evenly divisible by 21 400, that is all numbers such that the remainder of the division by 21 400 is zero. There are infinitely many multiples of 21 400. The smallest multiples of 21 400 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 400 too, since 0 × 21 400 = 0
• 21 400: indeed, 21 400 is a multiple of itself, since 21 400 is evenly divisible by 21 400 (we have 21 400 / 21 400 = 1, so the remainder of this division is indeed zero)
• 42 800: indeed, 42 800 = 21 400 × 2
• 64 200: indeed, 64 200 = 21 400 × 3
• 85 600: indeed, 85 600 = 21 400 × 4
• 107 000: indeed, 107 000 = 21 400 × 5
• etc.

• Preceding numbers: …21 398, 21 399
• Following numbers: 21 401, 21 402…

Nearest numbers from 21 400

• Preceding prime number: 21 397
• Following prime number: 21 401

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• 21 400 est-il un nombre premier ?