21321
Number 21321: Properties, Factors, and Mathematical Facts
Short answer
The number 21321 is an odd composite number with 12 positive divisors. Its prime factorization is 3² × 23 × 103. It is also a deficient number and a triangular number, which gives it several notable mathematical relationships.
Is 21321 prime?
ClassificationCompositeParityOddDivisor count12AbundanceDeficient
What is the prime factorization of 21321?
Prime factorization
3 squared times 23 times 103
What are the divisors of 21321?
Divisor count
12
Divisor sum
32,448
Proper divisor sum
11,127
- 1
- 3
- 9
- 23
- 69
- 103
- 207
- 309
- 927
- 2369
- 7107
- 21321
How is 21321 classified?
Prime
CompositeLearn more →
Perfect square
No
Perfect cube
No
Fibonacci
No
Triangular
YesLearn more →
Power of two
No
How is 21321 represented in other numeral systems?
Decimal
21321
Binary
101001101001001
Octal
51511
Hexadecimal
5349
Roman
No conventional Roman numeral
In words
twenty one thousand three hundred twenty one
Roots and powers
Square root
146.017122 Approximate
Cube root
27.729105 Approximate
Nearest lower square
21316
Nearest higher square
21609
Nearest lower cube
19683
Nearest higher cube
21952
Sequence position
Triangular
Index: 206
What are the digit properties of 21321?
Which numbers are related to 21321?
Why these results are true
- 21321 is composite because it has positive divisors other than 1 and itself.
- 21321 is triangular because it equals 206×(206+1)/2.
Compare this number
FAQ for 21321
- Is 21321 prime?
- No
- What is the prime factorization of 21321?
- 3² × 23 × 103
- Is 21321 a perfect square?
- No
- What is 21321 in binary?
- 101001101001001