Is 1985 a prime number?

1 985 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 1 985 is about 44.553.

Thus, the square root of 1 985 is not an integer, and therefore 1 985 is not a square number.

The square of a number (here 1 985) is the result of the product of this number (1 985) by itself (i.e., 1 985 × 1 985); the square of 1 985 is sometimes called "raising 1 985 to the power 2", or "1 985 squared".

The square of 1 985 is 3 940 225 because 1 985 × 1 985 = 1 985² = 3 940 225.

As a consequence, 1 985 is the square root of 3 940 225.

1 985 is a number with 4 digits.

The multiples of 1 985 are all integers evenly divisible by 1 985, that is all numbers such that the remainder of the division by 1 985 is zero. There are infinitely many multiples of 1 985. The smallest multiples of 1 985 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 985 too, since 0 × 1 985 = 0
• 1 985: indeed, 1 985 is a multiple of itself, since 1 985 is evenly divisible by 1 985 (we have 1 985 / 1 985 = 1, so the remainder of this division is indeed zero)
• 3 970: indeed, 3 970 = 1 985 × 2
• 5 955: indeed, 5 955 = 1 985 × 3
• 7 940: indeed, 7 940 = 1 985 × 4
• 9 925: indeed, 9 925 = 1 985 × 5
• etc.

• Preceding numbers: …1 983, 1 984
• Following numbers: 1 986, 1 987…

Nearest numbers from 1 985

• Preceding prime number: 1 979
• Following prime number: 1 987

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• 1 985 est-il un nombre premier ?