The number 74081
74081 is a composite number with 8 divisors. Its prime factorisation is 7 × 19 × 557. Divisors (8): 1, 7, 19, 133, 557, 3899, 10583, 74081.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 74081: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
74081 is composite. Its prime factorisation is
- 3
The divisors add up to 89280; without 74081 itself that is 15199, so 74081 is deficient (15199 is less than 74081). Euler's totient φ(74081) = 60048 numbers up to 74081 share no factor with it.
- 4
The digits of 74081 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 143 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74081 = 7 \times 19 \times 557 \]
74081 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 89280 |
| Euler totient φ(n) | 60048 |
| Square | 5487994561 |
| Cube | 406556125073441 |
| Square root | 272.178250 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 143 |
| Scientific notation | 7.4081 × |
74081 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand and eighty-one |
| Binary (base 2) | 10010000101100001 |
| Octal (base 8) | 220541 |
| Hexadecimal (base 16) | 12161 |
| Base 3 | 10202121202 |
| As time | 74081 seconds = 20 h 34 min 41 s |
Is 74081 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 | No (remainder 2) | 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 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (74081 ÷ 7 = 10583) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 74081 a prime number?
No. 74081 = 7 × 19 × 557, so it is divisible by 7.
What are the factors of 74081?
1, 7, 19, 133, 557, 3899, 10583, 74081.
What is 74081 in binary?
10010000101100001 (hexadecimal 12161, octal 220541).
What is the square root of 74081?
About 272.1783.
Is 74081 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 74081?
74081 is a happy number: repeatedly adding the squares of its digits reaches 1.