The number 80741
80741 is a composite number with 4 divisors. Its prime factorisation is 263 × 307. Divisors (4): 1, 263, 307, 80741.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80741: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 263 × 307, the product of two primes.
- 2
80741 is composite. Its prime factorisation is
- 3
The divisors add up to 81312; without 80741 itself that is 571, so 80741 is deficient (571 is less than 80741). Euler's totient φ(80741) = 80172 numbers up to 80741 share no factor with it.
- 4
The digits of 80741 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 138 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80741 = 263 \times 307 \]
80741 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 81312 |
| Euler totient φ(n) | 80172 |
| Square | 6519109081 |
| Cube | 526359386309021 |
| Square root | 284.149608 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 138 |
| Scientific notation | 8.0741 × |
80741 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand seven hundred and forty-one |
| Binary (base 2) | 10011101101100101 |
| Octal (base 8) | 235545 |
| Hexadecimal (base 16) | 13B65 |
| Base 3 | 11002202102 |
| As time | 80741 seconds = 22 h 25 min 41 s |
Is 80741 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 | 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 5) | 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 1) | 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 80741 a prime number?
No. 80741 = 263 × 307, so it is divisible by 263.
What are the factors of 80741?
1, 263, 307, 80741.
What is 80741 in binary?
10011101101100101 (hexadecimal 13B65, octal 235545).
What is the square root of 80741?
About 284.1496.
Is 80741 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 80741?
80741 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 263 × 307, the product of two primes.