Is 1145 a prime number?

1 145 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 1 145 is about 33.838.

Thus, the square root of 1 145 is not an integer, and therefore 1 145 is not a square number.

The square of a number (here 1 145) is the result of the product of this number (1 145) by itself (i.e., 1 145 × 1 145); the square of 1 145 is sometimes called "raising 1 145 to the power 2", or "1 145 squared".

The square of 1 145 is 1 311 025 because 1 145 × 1 145 = 1 145² = 1 311 025.

As a consequence, 1 145 is the square root of 1 311 025.

1 145 is a number with 4 digits.

The multiples of 1 145 are all integers evenly divisible by 1 145, that is all numbers such that the remainder of the division by 1 145 is zero. There are infinitely many multiples of 1 145. The smallest multiples of 1 145 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 145 too, since 0 × 1 145 = 0
• 1 145: indeed, 1 145 is a multiple of itself, since 1 145 is evenly divisible by 1 145 (we have 1 145 / 1 145 = 1, so the remainder of this division is indeed zero)
• 2 290: indeed, 2 290 = 1 145 × 2
• 3 435: indeed, 3 435 = 1 145 × 3
• 4 580: indeed, 4 580 = 1 145 × 4
• 5 725: indeed, 5 725 = 1 145 × 5
• etc.

• Preceding numbers: …1 143, 1 144
• Following numbers: 1 146, 1 147…

Nearest numbers from 1 145

• Preceding prime number: 1 129
• Following prime number: 1 151

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• 1 145 est-il un nombre premier ?