Primes / Is 45 prime?

Is 45 a Prime Number?

No45 = 3^2 x 5

45 is NOT prime: 3 × 15 = 45. That makes 3 a genuine divisor of 45 beyond 1 and 45 itself. Fully broken down, 45 = 3^2 × 5, for 6 divisors total. 45 sits between primes 43 and 47, 2 below and 2 above. 45: 3, 5, 9 divide 45 evenly, checked against 2-12. 45 is odd, digit sum 9 for 45, digital root 9 for 45. 45 has 5 primes within 10 of 45.