11476
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 21280
- Proper Divisor Sum (Aliquot Sum)
- 9804
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5400
- Möbius Function
- 0
- Radical
- 5738
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- yes
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- yes
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 37
- 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
- yes
- Odd
- no
Appears in sequences
- Pseudoprimes to base 5.at n=21A005936
- a(n) = 2*n*(4*n - 1).at n=38A014635
- Numbers k such that k | (3^k + 3).at n=16A015888
- Numbers k such that k | 12^k + 12.at n=24A015904
- Pseudoprimes to base 17.at n=30A020145
- a(n) = Sum_{k >= 1} floor((1+sqrt(2))^(n-k)).at n=10A020962
- Number of partitions of n into 9 unordered relatively prime parts.at n=39A023029
- Triangular numbers that have some nontrivial permutation of digits which is also triangular.at n=39A034291
- Triangular numbers (A000217) with prime indices.at n=35A034953
- Even triangular numbers with prime indices.at n=18A034955
- Images of hexamorphic numbers: suppose k-th hexagonal number H(k) (A000384) ends in k; sequence gives positive values of H(k).at n=8A038494
- Triangular numbers whose reverse is prime.at n=10A066751
- Triangular number x such that x + reverse of x is a prime.at n=4A072387
- Rearrangement of triangular numbers such that sum of two consecutive terms is a prime.at n=47A073655
- Triangular numbers which are 4-almost primes.at n=42A076578
- Triangular numbers which are also happy numbers (cf. A007770).at n=20A076712
- Triangular number pertaining to A081974. a(n) = A081974(n)*A081974(n+1).at n=39A081975
- Rearrangement of triangular numbers such that the sum of two consecutive terms is a palindrome.at n=37A082980
- Triangular numbers with palindromic indices.at n=24A089717
- Even pseudoprimes to base 5.at n=3A090082