# 16421

## 16,421 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 16421 look like?

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

16421 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 16421:

### 16421

See below for interesting mathematical facts about the number 16421 from the Numbermatics database.

### Names of 16421

• Cardinal: 16421 can be written as Sixteen thousand, four hundred twenty-one.

### Scientific notation

• Scientific notation: 1.6421 × 104

### Factors of 16421

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 16421

### Divisors of 16421

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 16422
• Sum of proper divisors (its aliquot sum) s(n): 1
• 16421 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 16420

### Bases of 16421

• Binary: 1000000001001012
• Base-36: CO5

### Squares and roots of 16421

• 16421 squared (164212) is 269649241
• 16421 cubed (164213) is 4427910186461
• The square root of 16421 is 128.1444497433
• The cube root of 16421 is 25.4175215455

### Scales and comparisons

How big is 16421?
• 16,421 seconds is equal to 4 hours, 33 minutes, 41 seconds.
• To count from 1 to 16,421 would take you about four 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 16421 cubic inches would be around 2.1 feet tall.

### Recreational maths with 16421

• 16421 backwards is 12461
• The number of decimal digits it has is: 5
• The sum of 16421's digits is 14
• More coming soon!