The number 61242
61242 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 59 × 173. Divisors (16): 1, 2, 3, 6, 59, 118, 173, 177, 346, 354, 519, 1038, 10207, 20414, 30621, 61242.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61242 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61242 is composite. Its prime factorisation is
- 3
The divisors add up to 125280; without 61242 itself that is 64038, so 61242 is abundant (64038 is more than 61242). Euler's totient φ(61242) = 19952 numbers up to 61242 share no factor with it.
- 4
The digits of 61242 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 86 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61242 = 2 \times 3 \times 59 \times 173 \]
61242 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 125280 |
| Euler totient φ(n) | 19952 |
| Square | 3750582564 |
| Cube | 229693177384488 |
| Square root | 247.471210 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 86 |
| Scientific notation | 6.1242 × |
61242 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand two hundred and forty-two |
| Binary (base 2) | 1110111100111010 |
| Octal (base 8) | 167472 |
| Hexadecimal (base 16) | EF3A |
| Base 3 | 10010000020 |
| As time | 61242 seconds = 17 h 0 min 42 s |
Is 61242 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61242 ÷ 2 = 30621) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (61242 ÷ 3 = 20414) | 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 | Yes (61242 ÷ 6 = 10207) | 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 2) | 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 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61242 a prime number?
No. 61242 = 2 × 3 × 59 × 173, so it is divisible by 2.
What are the factors of 61242?
1, 2, 3, 6, 59, 118, 173, 177, 346, 354, 519, 1038, 10207, 20414, 30621, 61242.
What is 61242 in binary?
1110111100111010 (hexadecimal EF3A, octal 167472).
What is the square root of 61242?
About 247.4712.
Is 61242 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 61242?
It is a composite number with 16 divisors.