Is 80561 a prime number?

80 561 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 80 561 is about 283.833.

Thus, the square root of 80 561 is not an integer, and therefore 80 561 is not a square number.

The square of a number (here 80 561) is the result of the product of this number (80 561) by itself (i.e., 80 561 × 80 561); the square of 80 561 is sometimes called "raising 80 561 to the power 2", or "80 561 squared".

The square of 80 561 is 6 490 074 721 because 80 561 × 80 561 = 80 561² = 6 490 074 721.

As a consequence, 80 561 is the square root of 6 490 074 721.

80 561 is a number with 5 digits.

The multiples of 80 561 are all integers evenly divisible by 80 561, that is all numbers such that the remainder of the division by 80 561 is zero. There are infinitely many multiples of 80 561. The smallest multiples of 80 561 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 80 561 too, since 0 × 80 561 = 0
• 80 561: indeed, 80 561 is a multiple of itself, since 80 561 is evenly divisible by 80 561 (we have 80 561 / 80 561 = 1, so the remainder of this division is indeed zero)
• 161 122: indeed, 161 122 = 80 561 × 2
• 241 683: indeed, 241 683 = 80 561 × 3
• 322 244: indeed, 322 244 = 80 561 × 4
• 402 805: indeed, 402 805 = 80 561 × 5
• etc.

• Preceding numbers: …80 559, 80 560
• Following numbers: 80 562, 80 563…

Nearest numbers from 80 561

• Preceding prime number: 80 557
• Following prime number: 80 567

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• 80 561 est-il un nombre premier ?