Is 1421 a prime number?

1 421 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 1 421 is about 37.696.

Thus, the square root of 1 421 is not an integer, and therefore 1 421 is not a square number.

The square of a number (here 1 421) is the result of the product of this number (1 421) by itself (i.e., 1 421 × 1 421); the square of 1 421 is sometimes called "raising 1 421 to the power 2", or "1 421 squared".

The square of 1 421 is 2 019 241 because 1 421 × 1 421 = 1 421² = 2 019 241.

As a consequence, 1 421 is the square root of 2 019 241.

1 421 is a number with 4 digits.

The multiples of 1 421 are all integers evenly divisible by 1 421, that is all numbers such that the remainder of the division by 1 421 is zero. There are infinitely many multiples of 1 421. The smallest multiples of 1 421 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 421 too, since 0 × 1 421 = 0
• 1 421: indeed, 1 421 is a multiple of itself, since 1 421 is evenly divisible by 1 421 (we have 1 421 / 1 421 = 1, so the remainder of this division is indeed zero)
• 2 842: indeed, 2 842 = 1 421 × 2
• 4 263: indeed, 4 263 = 1 421 × 3
• 5 684: indeed, 5 684 = 1 421 × 4
• 7 105: indeed, 7 105 = 1 421 × 5
• etc.

• Preceding numbers: …1 419, 1 420
• Following numbers: 1 422, 1 423…

Nearest numbers from 1 421

• Preceding prime number: 1 409
• Following prime number: 1 423

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• 1 421 est-il un nombre premier ?