Is 1245 a prime number?

1 245 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 1 245 is about 35.285.

Thus, the square root of 1 245 is not an integer, and therefore 1 245 is not a square number.

The square of a number (here 1 245) is the result of the product of this number (1 245) by itself (i.e., 1 245 × 1 245); the square of 1 245 is sometimes called "raising 1 245 to the power 2", or "1 245 squared".

The square of 1 245 is 1 550 025 because 1 245 × 1 245 = 1 245² = 1 550 025.

As a consequence, 1 245 is the square root of 1 550 025.

1 245 is a number with 4 digits.

The multiples of 1 245 are all integers evenly divisible by 1 245, that is all numbers such that the remainder of the division by 1 245 is zero. There are infinitely many multiples of 1 245. The smallest multiples of 1 245 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 245 too, since 0 × 1 245 = 0
• 1 245: indeed, 1 245 is a multiple of itself, since 1 245 is evenly divisible by 1 245 (we have 1 245 / 1 245 = 1, so the remainder of this division is indeed zero)
• 2 490: indeed, 2 490 = 1 245 × 2
• 3 735: indeed, 3 735 = 1 245 × 3
• 4 980: indeed, 4 980 = 1 245 × 4
• 6 225: indeed, 6 225 = 1 245 × 5
• etc.

• Preceding numbers: …1 243, 1 244
• Following numbers: 1 246, 1 247…

Nearest numbers from 1 245

• Preceding prime number: 1 237
• Following prime number: 1 249

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• 1 245 est-il un nombre premier ?