242
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 399
- Proper Divisor Sum (Aliquot Sum)
- 157
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 110
- Möbius Function
- 0
- Radical
- 22
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 96
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- zweihundertzweiundvierzig· ordinal: zweihundertzweiundvierzigste
- English
- two hundred forty-two· ordinal: two hundred forty-second
- Spanish
- doscientos cuarenta y dos· ordinal: 242º
- French
- deux cent quarante-deux· ordinal: deux cent quarante-deuxième
- Italian
- duecentoquarantadue· ordinal: 242º
- Latin
- ducenti quadraginta duo· ordinal: 242.
- Portuguese
- duzentos e quarenta e dois· ordinal: 242º
Appears in sequences
- Local stops on New York City 1 Train (Broadway-7 Avenue Local) subway.at n=28A000053
- Numbers k such that k^4 + 1 is prime.at n=35A000068
- Number of partitions into non-integral powers.at n=10A000148
- One half of number of non-self-conjugate partitions; also half of number of asymmetric Ferrers graphs with n nodes.at n=19A000701
- a(n) = ceiling(n^2/2).at n=22A000982
- Numbers k such that sum of squares of k consecutive integers >= 1 is a square.at n=29A001032
- a(n) = 2*n^2.at n=11A001105
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^5)).at n=20A001304
- Number of ways of making change for n cents using coins of 1, 2, 4, 10 cents.at n=41A001362
- Number of ways of making change for n cents using coins of 1, 2, 4, 10 cents.at n=40A001362
- Winning moves in Fibonacci nim.at n=42A001581
- v-pile numbers of the 3-Wythoff game with i=1.at n=56A001958
- v-pile positions of the 4-Wythoff game with i=1.at n=46A001964
- Nearest integer to n^2/8.at n=44A001971
- Expansion of 1/((1-x)^2*(1-x^4)) = 1/( (1+x)*(1+x^2)*(1-x)^3 ).at n=41A001972
- Numbers congruent to {2, 4, 8, 16} (mod 20).at n=48A002081
- Sum of totient function: a(n) = Sum_{k=1..n} phi(k), cf. A000010.at n=28A002088
- Palindromes in base 10.at n=33A002113
- Numbers m such that 6m-1, 6m+1 are twin primes.at n=46A002822
- Problimes (second definition).at n=45A003067