The number 62421
62421 is a composite number with 4 divisors. Its prime factorisation is 3 × 20807. Divisors (4): 1, 3, 20807, 62421.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 62421: a semiprime: 3 × 20807, the product of two primes.
- 2
62421 is composite. Its prime factorisation is
- 3
The divisors add up to 83232; without 62421 itself that is 20811, so 62421 is deficient (20811 is less than 62421). Euler's totient φ(62421) = 41612 numbers up to 62421 share no factor with it.
- 4
The digits of 62421 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 148 steps to reach 1.
LaTeX source of the formulas on this page
\[ 62421 = 3 \times 20807 \]
62421 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 83232 |
| Euler totient φ(n) | 41612 |
| Square | 3896381241 |
| Cube | 243216013444461 |
| Square root | 249.841950 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 148 |
| Scientific notation | 6.2421 × |
62421 in other forms
| Form | Value |
|---|---|
| In words | sixty-two thousand four hundred and twenty-one |
| Binary (base 2) | 1111001111010101 |
| Octal (base 8) | 171725 |
| Hexadecimal (base 16) | F3D5 |
| Base 3 | 10011121220 |
| As time | 62421 seconds = 17 h 20 min 21 s |
Is 62421 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 | Yes (62421 ÷ 3 = 20807) | 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 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 6) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 62421 a prime number?
No. 62421 = 3 × 20807, so it is divisible by 3.
What are the factors of 62421?
1, 3, 20807, 62421.
What is 62421 in binary?
1111001111010101 (hexadecimal F3D5, octal 171725).
What is the square root of 62421?
About 249.8420.
Is 62421 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 62421?
62421 is a semiprime: 3 × 20807, the product of two primes.