Surf Wiki
Save to docs
general/integers

From Surf Wiki (app.surf) — the open knowledge base

420 (number)

FieldValue
number420

420 (four hundred [and] twenty) is the natural number following 419 and preceding 421.

In mathematics

420 is:

  • the sum of four consecutive primes (101+103+107+109).
  • the sum of the first twenty positive even numbers.
  • a zero of the Mertens function and is sparsely totient.
  • a pronic number.
  • The least common multiple of numbers from 1 through 7; as a consequence of that, it is a Harshad number in bases 2 to 10, except in base 5.
  • a 141-gonal number.
  • a balanced number.
  • largely composite number

In other fields

  • The international country code for Czech Republic.
  • 420 (pronounced four-twenty) is also cannabis culture slang for cannabis consumption.

References

References

  1. {{Cite OEIS. A028442. Numbers n such that Mertens' function is zero
  2. {{Cite OEIS. A036913. Sparsely totient numbers
  3. {{Cite OEIS. A002378. Oblong (or promic, pronic, or heteromecic) numbers
  4. "A003418 - OEIS".
  5. {{cite OEIS. A020492. Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203)
  6. {{Cite OEIS. A067128. Ramanujan's largely composite numbers
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

integers
Want to explore this topic further?

Ask Mako anything about 420 (number) — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report