Factor Calculator

Factors of 1143

The factors of 1143 are 1, 3, 9, 127, 381, and 1143. In total, 1143 has 6 factors. Its prime factorization is 3² × 127, and the sum of all its factors is 1664.

All factors of 1143

Here are all 6 factors of 1143, listed from smallest to largest.

1391273811143

Factor pairs of 1143

These 3 pairs of whole numbers each multiply to give 1143.

1 × 1143 = 1143
3 × 381 = 1143
9 × 127 = 1143

Prime factorization of 1143

Dividing 1143 by the smallest prime at each step gives its prime factorization:

1143 ÷ 3 = 381
381 ÷ 3 = 127
127 ÷ 127 = 1
Result: 1143 = 3 × 3 × 127 = 3² × 127

The distinct prime factors of 1143 are 3, 127. To factorize any other number, use the prime factorization calculator.

Factor tree of 1143

A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.

Factor tree of 1143114333813127
Prime factors are shown in solid indigo. Composite numbers split into their smallest prime and the quotient.

Properties of 1143

Number of factors6
Sum of factors1664
Sum of proper factors521
Prime factorization3² × 127
Prime or composite?Composite
Even or odd?Odd
Perfect square?No
Perfect cube?No
ClassificationDeficient

What makes 1143 interesting

  • 1143 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 3 different ways.
  • 1143 is a deficient number: its proper factors sum to 521, which is 622 less than 1143 itself.

How to find the factors of 1143 yourself

Divide 1143 by each whole number starting from 1. Whenever the division leaves no remainder, both the divisor and the quotient are factors. You only need to test up to √1143 ≈ 33.81, because every factor above that pairs with one below it.

1143 ÷ 1 = 1143 ✓
1143 ÷ 3 = 381 ✓
1143 ÷ 9 = 127 ✓

Reading both columns gives every factor: 1, 3, 9, 127, 381, 1143. The factor calculator does this automatically for any number.

Numbers mathematically connected to 1143.

Frequently asked questions about 1143

What are the factors of 1143?

The factors of 1143 are 1, 3, 9, 127, 381, and 1143. That is 6 factors in total, counting both 1 and 1143.

Is 1143 a prime number?

No, 1143 is not prime — it is a composite number with 6 factors. A prime number has exactly two factors, but 1143 is also divisible by 3.

What is the prime factorization of 1143?

The prime factorization of 1143 is 3² × 127. Written out in full: 3 × 3 × 127 = 1143. Its distinct prime factors are 3, 127.

What two numbers multiply to give 1143?

There are 3 pairs of whole numbers that multiply to 1143: 1 × 1143, 3 × 381, 9 × 127.

What is the sum of the factors of 1143?

Adding all the factors of 1143 together gives 1664. Excluding 1143 itself, the proper factors sum to 521.

Is 1143 a perfect square?

No, 1143 is not a perfect square. There is no whole number that multiplies by itself to give 1143. The nearest perfect squares are 1089 and 1156.

What is the largest factor of 1143 other than itself?

The largest factor of 1143 apart from 1143 itself is 381, since 1143 ÷ 381 = 3.

How many factors does 1143 have?

1143 has 6 factors: 1, 3, 9, 127, 381, and 1143. You can verify this from the prime factorization 3² × 127: add 1 to each exponent and multiply, giving 3 × 2 = 6.

Explore more

Try another number in the factor calculator, break 1143 down further with the prime factorization calculator, or compare 1143 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.