# 7121

## 7,121 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 7121 look like?

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

7121 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 7121:

### 7121

See below for interesting mathematical facts about the number 7121 from the Numbermatics database.

### Names of 7121

• Cardinal: 7121 can be written as Seven thousand, one hundred twenty-one.

### Scientific notation

• Scientific notation: 7.121 × 103

### Factors of 7121

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 7121

### Divisors of 7121

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 7122
• Sum of proper divisors (its aliquot sum) s(n): 1
• 7121 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 7120

### Bases of 7121

• Binary: 11011110100012
• Base-36: 5HT

### Squares and roots of 7121

• 7121 squared (71212) is 50708641
• 7121 cubed (71213) is 361096232561
• The square root of 7121 is 84.3860177991
• The cube root of 7121 is 19.2389040455

### Scales and comparisons

How big is 7121?
• 7,121 seconds is equal to 1 hour, 58 minutes, 41 seconds.
• To count from 1 to 7,121 would take you about fifty-eight 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 7121 cubic inches would be around 1.6 feet tall.

### Recreational maths with 7121

• 7121 backwards is 1217
• The number of decimal digits it has is: 4
• The sum of 7121's digits is 11
• More coming soon!