Is 120406739 a prime number?
It is possible to find out using mathematical methods whether a given integer is a prime number or not.
Yes, 120 406 739 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 120 406 739, the only two divisors are 1 and 120 406 739. Therefore 120 406 739 is a prime number.
As a consequence, 120 406 739 is only a multiple of 1 and 120 406 739.
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Since 120406739 is a prime number, 120406739 is also a deficient number, that is to say 120406739 is a natural integer that is strictly larger than the sum of its proper divisors, i.e., the divisors of 120406739 without 120406739 itself (that is 1, by definition!).