Is 42657119 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 42 657 119 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 42 657 119, the only two divisors are 1 and 42 657 119. Therefore 42 657 119 is a prime number.
As a consequence, 42 657 119 is only a multiple of 1 and 42 657 119.
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Since 42657119 is a prime number, 42657119 is also a deficient number, that is to say 42657119 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 42657119 without 42657119 itself (that is 1, by definition!).