1127
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1368
- Proper Divisor Sum (Aliquot Sum)
- 241
- 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
- 924
- Möbius Function
- 0
- Radical
- 161
- 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
- 137
- Smith Number
- no
- Vampire 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
- no
- Odd
- yes
Appears in sequences
- a(n) = n*(n+3)/2.at n=46A000096
- a(n) = solution to the postage stamp problem with 3 denominations and n stamps.at n=23A001208
- Smallest number containing n syllables in UK English.at n=10A002810
- Numbers that are the sum of 11 positive 5th powers.at n=50A003356
- a(n) = floor(Fibonacci(n)/6).at n=20A004699
- a(n) = floor(n*phi^8), where phi is the golden ratio, A001622.at n=24A004923
- a(n) = round(n*phi^8), where phi is the golden ratio, A001622.at n=24A004943
- Moebius transform of triangular numbers.at n=46A007438
- Exponentiation of Fibonacci numbers.at n=5A007552
- Coordination sequence T6 for Zeolite Code BOG.at n=24A008054
- Coordination sequence T3 for Zeolite Code BRE.at n=22A008060
- Multiples of 23.at n=49A008605
- a(0) = 1, a(n) = 5*n^2 + 2 for n>0.at n=15A010001
- a(n) = n*(2*n + 3).at n=23A014106
- Numbers k such that sigma(k) = sigma(k+8).at n=9A015876
- Expansion of 1/(1-x^8-x^9-x^10-x^11-x^12-x^13-x^14).at n=51A017872
- Coordination sequence T3 for Zeolite Code CZP.at n=22A019458
- Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 1's than 2's.at n=6A022327
- a(n) = a(n-1) + c(n+1) for n >= 3, a( ) increasing, given a(1)=1, a(2)=8; where c( ) is complement of a( ).at n=41A022954
- (d(n)-r(n))/2, where d = A008778 and r is the periodic sequence with fundamental period (1,1,0,1).at n=20A026052