The number 30421
30421 is a composite number with 4 divisors. Its prime factorisation is 29 × 1049. Divisors (4): 1, 29, 1049, 30421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 30421: a semiprime: 29 × 1049, the product of two primes.
- 2
30421 is composite. Its prime factorisation is
- 3
The divisors add up to 31500; without 30421 itself that is 1079, so 30421 is deficient (1079 is less than 30421). Euler's totient φ(30421) = 29344 numbers up to 30421 share no factor with it.
- 4
The digits of 30421 add up to 10, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 33 steps to reach 1.
LaTeX source of the formulas on this page
\[ 30421 = 29 \times 1049 \]
30421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 31500 |
| Euler totient φ(n) | 29344 |
| Square | 925437241 |
| Cube | 28152726308461 |
| Square root | 174.416169 |
| Digit sum / digital root | 10 / 1 |
| Collatz steps to 1 | 33 |
| Scientific notation | 3.0421 × |
30421 in other forms
| Form | Value |
|---|---|
| In words | thirty thousand four hundred and twenty-one |
| Binary (base 2) | 111011011010101 |
| Octal (base 8) | 73325 |
| Hexadecimal (base 16) | 76D5 |
| Base 3 | 1112201201 |
| As time | 30421 seconds = 8 h 27 min 1 s |
Is 30421 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 6) | 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 1) | 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 6) | 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 30421 a prime number?
No. 30421 = 29 × 1049, so it is divisible by 29.
What are the factors of 30421?
1, 29, 1049, 30421.
What is 30421 in binary?
111011011010101 (hexadecimal 76D5, octal 73325).
What is the square root of 30421?
About 174.4162.
Is 30421 divisible by 3?
No. Its digits add up to 10, which is not a multiple of 3.
What is special about the number 30421?
30421 is a semiprime: 29 × 1049, the product of two primes.