Is 21025 a prime number?

21 025 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 21 025 is 145.

Therefore, the square root of 21 025 is an integer, and as a consequence 21 025 is a perfect square.

As a consequence, 145 is the square root of 21 025.

The square of a number (here 21 025) is the result of the product of this number (21 025) by itself (i.e., 21 025 × 21 025); the square of 21 025 is sometimes called "raising 21 025 to the power 2", or "21 025 squared".

The square of 21 025 is 442 050 625 because 21 025 × 21 025 = 21 025² = 442 050 625.

As a consequence, 21 025 is the square root of 442 050 625.

21 025 is a number with 5 digits.

The multiples of 21 025 are all integers evenly divisible by 21 025, that is all numbers such that the remainder of the division by 21 025 is zero. There are infinitely many multiples of 21 025. The smallest multiples of 21 025 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 21 025 too, since 0 × 21 025 = 0
• 21 025: indeed, 21 025 is a multiple of itself, since 21 025 is evenly divisible by 21 025 (we have 21 025 / 21 025 = 1, so the remainder of this division is indeed zero)
• 42 050: indeed, 42 050 = 21 025 × 2
• 63 075: indeed, 63 075 = 21 025 × 3
• 84 100: indeed, 84 100 = 21 025 × 4
• 105 125: indeed, 105 125 = 21 025 × 5
• etc.

• Preceding numbers: …21 023, 21 024
• Following numbers: 21 026, 21 027…

Nearest numbers from 21 025

• Preceding prime number: 21 023
• Following prime number: 21 031

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• 21 025 est-il un nombre premier ?