420 (number)

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419 420 421
Cardinal four hundred twenty
Ordinal 420th
(four hundred twentieth)
Factorization 22 × 3 × 5 × 7
Greek numeral ΥΚ´
Roman numeral CDXX
Binary 1101001002
Ternary 1201203
Senary 15406
Octal 6448
Duodecimal 2B012
Hexadecimal 1A416

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

Contents

In mathematics

420 is:

In other fields

Related Research Articles

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58 (fifty-eight) is the natural number following 57 and preceding 59.

64 (sixty-four) is the natural number following 63 and preceding 65.

100 or one hundred is the natural number following 99 and preceding 101.

1000 or one thousand is the natural number following 999 and preceding 1001. In most English-speaking countries, it can be written with or without a comma or sometimes a period separating the thousands digit: 1,000.

300 is the natural number following 299 and preceding 301.

<span class="mw-page-title-main">360 (number)</span> Natural number

360 is the natural number following 359 and preceding 361.

400 is the natural number following 399 and preceding 401.

500 is the natural number following 499 and preceding 501.

700 is the natural number following 699 and preceding 701.

600 is the natural number following 599 and preceding 601.

800 is the natural number following 799 and preceding 801.

900 is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 positive integers. In base 10, it is a Harshad number. It is also the first number to be the square of a sphenic number.

2000 is a natural number following 1999 and preceding 2001.

3000 is the natural number following 2999 and preceding 3001. It is the smallest number requiring thirteen letters in English.

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References

  1. Sloane, N. J. A. (ed.). "SequenceA028442(Numbers n such that Mertens' function is zero)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  2. Sloane, N. J. A. (ed.). "SequenceA036913(Sparsely totient numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  3. Sloane, N. J. A. (ed.). "SequenceA002378(Oblong (or promic, pronic, or heteromecic) numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  4. "A003418 - OEIS". oeis.org. Retrieved 2024-11-20.
  5. Sloane, N. J. A. (ed.). "SequenceA020492(Balanced numbers: numbers k such that phi(k) (A000010) divides sigma(k) (A000203))". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  6. Sloane, N. J. A. (ed.). "SequenceA067128(Ramanujan's largely composite numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
  7. "How marijuana's high holiday came to be". Associated Press. 2017-04-20. Retrieved 2024-11-20.