MathQuarryCalculators

Primes / Is 128 prime?

Is 128 a Prime Number?

No128 = 2^7

128 is NOT prime: 2 × 64 = 128. That makes 2 a genuine divisor of 128 beyond 1 and 128 itself. Fully broken down, 128 = 2^7, for 8 divisors total. 128 sits between primes 127 and 131, 1 below and 3 above. 128: 2, 4, 8 divide 128 evenly, checked against 2-12. 128 is even, digit sum 11 for 128, digital root 2 for 128. 128 has 3 primes within 10 of 128.

Factors
1, 2, 4, 8, 16, 32, 64, 128
Number of factors
8
Prime?
No
Prime factorization
2^7
Even or odd
Even
Square
16384
Cube
2097152
Binary
10000000
Hexadecimal
80
Roman numeral
CXXVIII
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Full facts for 128 →Factors of 128 →