# 842

## 842 is an even composite number composed of two prime numbers multiplied together.

What does the number 842 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

842 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 842:

### 2 × 421

See below for interesting mathematical facts about the number 842 from the Numbermatics database.

### Names of 842

• Cardinal: 842 can be written as Eight hundred forty-two.

### Scientific notation

• Scientific notation: 8.42 × 102

### Factors of 842

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 423

### Divisors of 842

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1266
• Sum of proper divisors (its aliquot sum) s(n): 424
• 842 is a deficient number, because the sum of its proper divisors (424) is less than itself. Its deficiency is 418

### Bases of 842

• Binary: 11010010102
• Base-36: NE

### Squares and roots of 842

• 842 squared (8422) is 708964
• 842 cubed (8423) is 596947688
• The square root of 842 is 29.0172362571
• The cube root of 842 is 9.4428704285

### Scales and comparisons

How big is 842?
• 842 seconds is equal to 14 minutes, 2 seconds.
• To count from 1 to 842 would take you about seven 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 842 cubic inches would be around 0.8 feet tall.

### Recreational maths with 842

• 842 backwards is 248
• The number of decimal digits it has is: 3
• The sum of 842's digits is 14
• More coming soon!