# 1321

## 1,321 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 1321 look like?

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

1321 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1321:

### 1321

See below for interesting mathematical facts about the number 1321 from the Numbermatics database.

### Names of 1321

• Cardinal: 1321 can be written as One thousand, three hundred twenty-one.

### Scientific notation

• Scientific notation: 1.321 × 103

### Factors of 1321

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1321

### Divisors of 1321

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1322
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1321 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1320

### Bases of 1321

• Binary: 101001010012
• Base-36: 10P

### Squares and roots of 1321

• 1321 squared (13212) is 1745041
• 1321 cubed (13213) is 2305199161
• The square root of 1321 is 36.3455636907
• The cube root of 1321 is 10.9723825099

### Scales and comparisons

How big is 1321?
• 1,321 seconds is equal to 22 minutes, 1 second.
• To count from 1 to 1,321 would take you about twenty-two minutes.

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 1321 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1321

• 1321 backwards is 1231
• The number of decimal digits it has is: 4
• The sum of 1321's digits is 7
• More coming soon!