The number 71401
71401 is a composite number with 4 divisors. Its prime factorisation is 11 × 6491. Divisors (4): 1, 11, 6491, 71401.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71401: a semiprime: 11 × 6491, the product of two primes.
- 2
71401 is composite. Its prime factorisation is
- 3
The divisors add up to 77904; without 71401 itself that is 6503, so 71401 is deficient (6503 is less than 71401). Euler's totient φ(71401) = 64900 numbers up to 71401 share no factor with it.
- 4
The digits of 71401 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 99 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71401 = 11 \times 6491 \]
71401 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 77904 |
| Euler totient φ(n) | 64900 |
| Square | 5098102801 |
| Cube | 364009638094201 |
| Square root | 267.209656 |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 99 |
| Scientific notation | 7.1401 × |
71401 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and one |
| Binary (base 2) | 10001011011101001 |
| Octal (base 8) | 213351 |
| Hexadecimal (base 16) | 116E9 |
| Base 3 | 10121221111 |
| As time | 71401 seconds = 19 h 50 min 1 s |
Is 71401 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 1) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 4) | 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 | Yes (71401 ÷ 11 = 6491) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71401 a prime number?
No. 71401 = 11 × 6491, so it is divisible by 11.
What are the factors of 71401?
1, 11, 6491, 71401.
What is 71401 in binary?
10001011011101001 (hexadecimal 116E9, octal 213351).
What is the square root of 71401?
About 267.2097.
Is 71401 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 71401?
71401 is a semiprime: 11 × 6491, the product of two primes.