The number 71450
71450 is a composite number with 12 divisors. Its prime factorisation is 2 × × 1429. Divisors (12): 1, 2, 5, 10, 25, 50, 1429, 2858, 7145, 14290, 35725, 71450.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 71450: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
71450 is composite. Its prime factorisation is
- 3
The divisors add up to 132990; without 71450 itself that is 61540, so 71450 is deficient (61540 is less than 71450). Euler's totient φ(71450) = 28560 numbers up to 71450 share no factor with it.
- 4
The digits of 71450 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 50 steps to reach 1.
LaTeX source of the formulas on this page
\[ 71450 = 2 \times 5^{2} \times 1429 \]71450 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 132990 |
| Euler totient φ(n) | 28560 |
| Square | 5105102500 |
| Cube | 364759573625000 |
| Square root | 267.301328 (= 5√2858) |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 50 |
| Scientific notation | 7.145 × |
71450 in other forms
| Form | Value |
|---|---|
| In words | seventy-one thousand four hundred and fifty |
| Binary (base 2) | 10001011100011010 |
| Octal (base 8) | 213432 |
| Hexadecimal (base 16) | 1171A |
| Base 3 | 10122000022 |
| As time | 71450 seconds = 19 h 50 min 50 s |
Is 71450 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (71450 ÷ 2 = 35725) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (71450 ÷ 5 = 14290) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (71450 ÷ 10 = 7145) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 71450 a prime number?
No. 71450 = 2 × × 1429, so it is divisible by 2.
What are the factors of 71450?
1, 2, 5, 10, 25, 50, 1429, 2858, 7145, 14290, 35725, 71450.
What is 71450 in binary?
10001011100011010 (hexadecimal 1171A, octal 213432).
What is the square root of 71450?
About 267.3013, exactly 5√2858.
Is 71450 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 71450?
71450 is a happy number: repeatedly adding the squares of its digits reaches 1.