Primes / Is 129 prime?

Is 129 a Prime Number?

No129 = 3 x 43

129 is NOT prime: 3 × 43 = 129. That makes 3 a genuine divisor of 129 beyond 1 and 129 itself. Fully broken down, 129 = 3 × 43, for 4 divisors total. 129 sits between primes 127 and 131, 2 below and 2 above. 129: 3 divide 129 evenly, checked against 2-12. 129 is odd, digit sum 12 for 129, digital root 3 for 129. 129 has 4 primes within 10 of 129.