The number 74213
74213 is a composite number with 4 divisors. Its prime factorisation is 47 × 1579. Divisors (4): 1, 47, 1579, 74213.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 74213: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 47 × 1579, the product of two primes.
- 2
74213 is composite. Its prime factorisation is
- 3
The divisors add up to 75840; without 74213 itself that is 1627, so 74213 is deficient (1627 is less than 74213). Euler's totient φ(74213) = 72588 numbers up to 74213 share no factor with it.
- 4
The digits of 74213 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 63 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74213 = 47 \times 1579 \]
74213 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 75840 |
| Euler totient φ(n) | 72588 |
| Square | 5507569369 |
| Cube | 408733245581597 |
| Square root | 272.420631 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 63 |
| Scientific notation | 7.4213 × |
74213 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand two hundred and thirteen |
| Binary (base 2) | 10010000111100101 |
| Octal (base 8) | 220745 |
| Hexadecimal (base 16) | 121E5 |
| Base 3 | 10202210122 |
| As time | 74213 seconds = 20 h 36 min 53 s |
Is 74213 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 3) | 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 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 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 3) | 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 74213 a prime number?
No. 74213 = 47 × 1579, so it is divisible by 47.
What are the factors of 74213?
1, 47, 1579, 74213.
What is 74213 in binary?
10010000111100101 (hexadecimal 121E5, octal 220745).
What is the square root of 74213?
About 272.4206.
Is 74213 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 74213?
74213 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 47 × 1579, the product of two primes.