# 8561

## 8,561 is an odd composite number composed of two prime numbers multiplied together.

What does the number 8561 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

8561 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 8561:

### 7 × 1223

See below for interesting mathematical facts about the number 8561 from the Numbermatics database.

### Names of 8561

• Cardinal: 8561 can be written as Eight thousand, five hundred sixty-one.

### Scientific notation

• Scientific notation: 8.561 × 103

### Factors of 8561

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 1230

### Divisors of 8561

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 9792
• Sum of proper divisors (its aliquot sum) s(n): 1231
• 8561 is a deficient number, because the sum of its proper divisors (1231) is less than itself. Its deficiency is 7330

### Bases of 8561

• Binary: 100001011100012
• Base-36: 6LT

### Squares and roots of 8561

• 8561 squared (85612) is 73290721
• 8561 cubed (85613) is 627441862481
• The square root of 8561 is 92.5256721133
• The cube root of 8561 is 20.4569789847

### Scales and comparisons

How big is 8561?
• 8,561 seconds is equal to 2 hours, 22 minutes, 41 seconds.
• To count from 1 to 8,561 would take you about two hours.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 8561 cubic inches would be around 1.7 feet tall.

### Recreational maths with 8561

• 8561 backwards is 1658
• The number of decimal digits it has is: 4
• The sum of 8561's digits is 20
• More coming soon!