The number 33421
33421 is a composite number with 4 divisors. Its prime factorisation is 19 × 1759. Divisors (4): 1, 19, 1759, 33421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33421: a semiprime: 19 × 1759, the product of two primes.
- 2
33421 is composite. Its prime factorisation is
- 3
The divisors add up to 35200; without 33421 itself that is 1779, so 33421 is deficient (1779 is less than 33421). Euler's totient φ(33421) = 31644 numbers up to 33421 share no factor with it.
- 4
The digits of 33421 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 129 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33421 = 19 \times 1759 \]
33421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 35200 |
| Euler totient φ(n) | 31644 |
| Square | 1116963241 |
| Cube | 37330028477461 |
| Square root | 182.814113 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 129 |
| Scientific notation | 3.3421 × |
33421 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand four hundred and twenty-one |
| Binary (base 2) | 1000001010001101 |
| Octal (base 8) | 101215 |
| Hexadecimal (base 16) | 828D |
| Base 3 | 1200211211 |
| As time | 33421 seconds = 9 h 17 min 1 s |
Is 33421 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 33421 a prime number?
No. 33421 = 19 × 1759, so it is divisible by 19.
What are the factors of 33421?
1, 19, 1759, 33421.
What is 33421 in binary?
1000001010001101 (hexadecimal 828D, octal 101215).
What is the square root of 33421?
About 182.8141.
Is 33421 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 33421?
33421 is a semiprime: 19 × 1759, the product of two primes.