# 1231

## 1,231 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 1231 look like?

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

1231 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1231:

### 1231

See below for interesting mathematical facts about the number 1231 from the Numbermatics database.

### Names of 1231

• Cardinal: 1231 can be written as One thousand, two hundred thirty-one.

### Scientific notation

• Scientific notation: 1.231 × 103

### Factors of 1231

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1231

### Divisors of 1231

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1232
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1231 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1230

### Bases of 1231

• Binary: 100110011112
• Base-36: Y7

### Squares and roots of 1231

• 1231 squared (12312) is 1515361
• 1231 cubed (12313) is 1865409391
• The square root of 1231 is 35.0856095857
• The cube root of 1231 is 10.7173155453

### Scales and comparisons

How big is 1231?
• 1,231 seconds is equal to 20 minutes, 31 seconds.
• To count from 1 to 1,231 would take you about twenty 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 1231 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1231

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