Is 420855107 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 420 855 107 is a prime number.
Indeed, the definition of a prime numbers is to have exactly two distinct positive divisors, 1 and itself. A number is a divisor of another number when the remainder of Euclid’s division of the second one by the first one is zero. Concerning the number 420 855 107, the only two divisors are 1 and 420 855 107. Therefore 420 855 107 is a prime number.
As a consequence, 420 855 107 is only a multiple of 1 and 420 855 107.
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Since 420855107 is a prime number, 420855107 is also a deficient number, that is to say 420855107 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 420855107 without 420855107 itself (that is 1, by definition!).
