The number 61442
61442 is a composite number with 8 divisors. Its prime factorisation is 2 × 31 × 991. Divisors (8): 1, 2, 31, 62, 991, 1982, 30721, 61442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61442 is composite. Its prime factorisation is
- 3
The divisors add up to 95232; without 61442 itself that is 33790, so 61442 is deficient (33790 is less than 61442). Euler's totient φ(61442) = 29700 numbers up to 61442 share no factor with it.
- 4
The digits of 61442 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 179 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61442 = 2 \times 31 \times 991 \]
61442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 95232 |
| Euler totient φ(n) | 29700 |
| Square | 3775119364 |
| Cube | 231950883962888 |
| Square root | 247.874968 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 179 |
| Scientific notation | 6.1442 × |
61442 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand four hundred and forty-two |
| Binary (base 2) | 1111000000000010 |
| Octal (base 8) | 170002 |
| Hexadecimal (base 16) | F002 |
| Base 3 | 10010021122 |
| As time | 61442 seconds = 17 h 4 min 2 s |
Is 61442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61442 ÷ 2 = 30721) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | 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 2) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61442 a prime number?
No. 61442 = 2 × 31 × 991, so it is divisible by 2.
What are the factors of 61442?
1, 2, 31, 62, 991, 1982, 30721, 61442.
What is 61442 in binary?
1111000000000010 (hexadecimal F002, octal 170002).
What is the square root of 61442?
About 247.8750.
Is 61442 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 61442?
It is a composite number with 8 divisors.