The number 61437
61437 is a composite number with 4 divisors. Its prime factorisation is 3 × 20479. Divisors (4): 1, 3, 20479, 61437.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61437: a semiprime: 3 × 20479, the product of two primes.
- 2
61437 is composite. Its prime factorisation is
- 3
The divisors add up to 81920; without 61437 itself that is 20483, so 61437 is deficient (20483 is less than 61437). Euler's totient φ(61437) = 40956 numbers up to 61437 share no factor with it.
- 4
The digits of 61437 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 241 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61437 = 3 \times 20479 \]
61437 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 81920 |
| Euler totient φ(n) | 40956 |
| Square | 3774504969 |
| Cube | 231894261780453 |
| Square root | 247.864883 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 241 |
| Scientific notation | 6.1437 × |
61437 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand four hundred and thirty-seven |
| Binary (base 2) | 1110111111111101 |
| Octal (base 8) | 167775 |
| Hexadecimal (base 16) | EFFD |
| Base 3 | 10010021110 |
| As time | 61437 seconds = 17 h 3 min 57 s |
Is 61437 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 (61437 ÷ 3 = 20479) | 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 2) | 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 5) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | 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 61437 a prime number?
No. 61437 = 3 × 20479, so it is divisible by 3.
What are the factors of 61437?
1, 3, 20479, 61437.
What is 61437 in binary?
1110111111111101 (hexadecimal EFFD, octal 167775).
What is the square root of 61437?
About 247.8649.
Is 61437 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 61437?
61437 is a semiprime: 3 × 20479, the product of two primes.