The number 72141
72141 is a composite number with 8 divisors. Its prime factorisation is 3 × 139 × 173. Divisors (8): 1, 3, 139, 173, 417, 519, 24047, 72141.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
72141 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
72141 is composite. Its prime factorisation is
- 3
The divisors add up to 97440; without 72141 itself that is 25299, so 72141 is deficient (25299 is less than 72141). Euler's totient φ(72141) = 47472 numbers up to 72141 share no factor with it.
- 4
The digits of 72141 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 42 steps to reach 1.
LaTeX source of the formulas on this page
\[ 72141 = 3 \times 139 \times 173 \]
72141 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 97440 |
| Euler totient φ(n) | 47472 |
| Square | 5204323881 |
| Cube | 375445129099221 |
| Square root | 268.590767 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 42 |
| Scientific notation | 7.2141 × |
72141 in other forms
| Form | Value |
|---|---|
| In words | seventy-two thousand one hundred and forty-one |
| Binary (base 2) | 10001100111001101 |
| Octal (base 8) | 214715 |
| Hexadecimal (base 16) | 119CD |
| Base 3 | 10122221220 |
| As time | 72141 seconds = 20 h 2 min 21 s |
Is 72141 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 (72141 ÷ 3 = 24047) | 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 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 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 3) | 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 72141 a prime number?
No. 72141 = 3 × 139 × 173, so it is divisible by 3.
What are the factors of 72141?
1, 3, 139, 173, 417, 519, 24047, 72141.
What is 72141 in binary?
10001100111001101 (hexadecimal 119CD, octal 214715).
What is the square root of 72141?
About 268.5908.
Is 72141 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 72141?
It is a composite number with 8 divisors.