# 25921

## 25,921 is an odd composite number composed of two prime numbers multiplied together.

What does the number 25921 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 9 divisors.

25921 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of nine divisors.

## Prime factorization of 25921:

### 72 × 232

(7 × 7 × 23 × 23)

See below for interesting mathematical facts about the number 25921 from the Numbermatics database.

### Names of 25921

• Cardinal: 25921 can be written as Twenty-five thousand, nine hundred twenty-one.

### Scientific notation

• Scientific notation: 2.5921 × 104

### Factors of 25921

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 30

### Divisors of 25921

• Number of divisors d(n): 9
• Complete list of divisors:
• Sum of all divisors σ(n): 31521
• Sum of proper divisors (its aliquot sum) s(n): 5600
• 25921 is a deficient number, because the sum of its proper divisors (5600) is less than itself. Its deficiency is 20321

### Bases of 25921

• Binary: 1100101010000012
• Base-36: K01

### Squares and roots of 25921

• 25921 squared (259212) is 671898241
• 25921 cubed (259213) is 17416274304961
• 25921 is a perfect square number. Its square root is 161
• The cube root of 25921 is 29.5949254753

### Scales and comparisons

How big is 25921?
• 25,921 seconds is equal to 7 hours, 12 minutes, 1 second.
• To count from 1 to 25,921 would take you about seven 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 25921 cubic inches would be around 2.5 feet tall.

### Recreational maths with 25921

• 25921 backwards is 12952
• The number of decimal digits it has is: 5
• The sum of 25921's digits is 19
• More coming soon!