Is 421009 a prime number?

421 009 is an odd number, because it is not evenly divisible by 2.

Find out more:

• 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 421 009 is about 648.852.

Thus, the square root of 421 009 is not an integer, and therefore 421 009 is not a square number.

Anyway, 421 009 is a prime number, and a prime number cannot be a perfect square.

The square of a number (here 421 009) is the result of the product of this number (421 009) by itself (i.e., 421 009 × 421 009); the square of 421 009 is sometimes called "raising 421 009 to the power 2", or "421 009 squared".

The square of 421 009 is 177 248 578 081 because 421 009 × 421 009 = 421 009² = 177 248 578 081.

As a consequence, 421 009 is the square root of 177 248 578 081.

421 009 is a number with 6 digits.

The multiples of 421 009 are all integers evenly divisible by 421 009, that is all numbers such that the remainder of the division by 421 009 is zero. There are infinitely many multiples of 421 009. The smallest multiples of 421 009 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 421 009 too, since 0 × 421 009 = 0
• 421 009: indeed, 421 009 is a multiple of itself, since 421 009 is evenly divisible by 421 009 (we have 421 009 / 421 009 = 1, so the remainder of this division is indeed zero)
• 842 018: indeed, 842 018 = 421 009 × 2
• 1 263 027: indeed, 1 263 027 = 421 009 × 3
• 1 684 036: indeed, 1 684 036 = 421 009 × 4
• 2 105 045: indeed, 2 105 045 = 421 009 × 5
• etc.

• Preceding numbers: …421 007, 421 008
• Following numbers: 421 010, 421 011…

Nearest numbers from 421 009

• Preceding prime number: 420 997
• Following prime number: 421 019

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• 421 009 est-il un nombre premier ?