421

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 421 look like?

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

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

Prime factorization of 421:

421

See below for interesting mathematical facts about the number 421 from the Numbermatics database.

Names of 421

Cardinal: 421 can be written as Four hundred twenty-one.

Scientific notation

Scientific notation: 4.21 × 10²

Factors of 421

Number of distinct prime factors ω(n): 1
Total number of prime factors Ω(n): 1
Sum of prime factors: 421

Divisors of 421

Number of divisors d(n): 2
Complete list of divisors:
1 421
Sum of all divisors σ(n): 422
Sum of proper divisors (its aliquot sum) s(n): 1
421 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 420

Bases of 421

Binary: 110100101₂
Hexadecimal: 0x1A5
Base-36: BP

Squares and roots of 421

421 squared (421²) is 177241
421 cubed (421³) is 74618461
The square root of 421 is 20.5182845287
The cube root of 421 is 7.4948112259

Scales and comparisons

How big is 421?

421 seconds is equal to 7 minutes, 1 second.
To count from 1 to 421 would take you about three 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 421 cubic inches would be around 0.6 feet tall.

Recreational maths with 421

421 backwards is 124
The number of decimal digits it has is: 3
The sum of 421's digits is 7
More coming soon!

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The information we have on file for 421 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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