427
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 496
- Proper Divisor Sum (Aliquot Sum)
- 69
- 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
- 360
- Möbius Function
- 1
- Radical
- 427
- Omega Function (Ω)
- 2
- 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
- 53
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- no
- Odd
- yes
Names
- German
- vierhundertsiebenundzwanzig· ordinal: vierhundertsiebenundzwanzigste
- English
- four hundred twenty-seven· ordinal: four hundred twenty-seventh
- Spanish
- cuatrocientos veintisiete· ordinal: 427º
- French
- quatre cent vingt-sept· ordinal: quatre cent vingt-septième
- Italian
- quattrocentoventisette· ordinal: 427º
- Latin
- quadringenti viginti septem· ordinal: 427.
- Portuguese
- quatrocentos e vinte e sete· ordinal: 427º
Appears in sequences
- Number of partitions into non-integral powers.at n=5A000345
- Numbers beginning with letter 'f' in English.at n=51A000867
- a(n) is the solution to the postage stamp problem with 4 denominations and n stamps.at n=9A001209
- Number of ways of making change for n cents using coins of 1, 2, 5, 10, 25 cents.at n=51A001301
- Number of partitions of n into at most 5 parts.at n=26A001401
- Mixed partitions of n.at n=18A002096
- Numbers k such that (k^2 + k + 1)/3 is prime.at n=51A002640
- Solid partitions of n which are restricted to two planes.at n=8A002835
- Numbers k such that k! + 1 is prime.at n=15A002981
- a(n) = A001950(A003234(n)) + 1.at n=44A003249
- Discriminants of the known imaginary quadratic fields with 1 class per genus (a finite sequence).at n=38A003644
- a(0) = 1, a(n) = sum of digits of all previous terms.at n=45A004207
- Divisible only by primes congruent to 1 mod 3.at n=51A004611
- Numbers whose binary expansion ends in 011.at n=52A004769
- Number of series-reduced labeled trees with n nodes.at n=6A005512
- Number of compact-rooted directed animals of size n having 3 source points.at n=5A005775
- Imaginary quadratic fields with class number 2 (a finite sequence).at n=17A005847
- Centered dodecahedral numbers.at n=3A005904
- a(n+1) = a(n) + sum of digits of a(n), with a(1)=7.at n=40A006507
- Binary palindromes: numbers whose binary expansion is palindromic.at n=41A006995