The number 42149
42149 is a composite number with 4 divisors. Its prime factorisation is 113 × 373. Divisors (4): 1, 113, 373, 42149.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42149: a semiprime: 113 × 373, the product of two primes.
- 2
42149 is composite. Its prime factorisation is
- 3
The divisors add up to 42636; without 42149 itself that is 487, so 42149 is deficient (487 is less than 42149). Euler's totient φ(42149) = 41664 numbers up to 42149 share no factor with it.
- 4
The digits of 42149 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 80 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42149 = 113 \times 373 \]
42149 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 42636 |
| Euler totient φ(n) | 41664 |
| Square | 1776538201 |
| Cube | 74879308633949 |
| Square root | 205.302216 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 80 |
| Scientific notation | 4.2149 × |
42149 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand one hundred and forty-nine |
| Binary (base 2) | 1010010010100101 |
| Octal (base 8) | 122245 |
| Hexadecimal (base 16) | A4A5 |
| Base 3 | 2010211002 |
| As time | 42149 seconds = 11 h 42 min 29 s |
Is 42149 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 4) | 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 2) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | 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 42149 a prime number?
No. 42149 = 113 × 373, so it is divisible by 113.
What are the factors of 42149?
1, 113, 373, 42149.
What is 42149 in binary?
1010010010100101 (hexadecimal A4A5, octal 122245).
What is the square root of 42149?
About 205.3022.
Is 42149 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42149?
42149 is a semiprime: 113 × 373, the product of two primes.