# 81401

## 81,401 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 81401 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

81401 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 81401:

### 81401

See below for interesting mathematical facts about the number 81401 from the Numbermatics database.

### Names of 81401

• Cardinal: 81401 can be written as Eighty-one thousand, four hundred one.

### Scientific notation

• Scientific notation: 8.1401 × 104

### Factors of 81401

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 81401

### Divisors of 81401

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 81402
• Sum of proper divisors (its aliquot sum) s(n): 1
• 81401 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 81400

### Bases of 81401

• Binary: 100111101111110012
• Base-36: 1QT5

### Squares and roots of 81401

• 81401 squared (814012) is 6626122801
• 81401 cubed (814013) is 539373022124201
• The square root of 81401 is 285.3086048475
• The cube root of 81401 is 43.3387698637

### Scales and comparisons

How big is 81401?
• 81,401 seconds is equal to 22 hours, 36 minutes, 41 seconds.
• To count from 1 to 81,401 would take you about twenty-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 81401 cubic inches would be around 3.6 feet tall.

### Recreational maths with 81401

• 81401 backwards is 10418
• The number of decimal digits it has is: 5
• The sum of 81401's digits is 14
• More coming soon!