14196
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 36
- Divisor Sum
- 40992
- Proper Divisor Sum (Aliquot Sum)
- 26796
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3744
- Möbius Function
- 0
- Radical
- 546
- Omega Function (Ω)
- 6
- Little Omega Function (ω)
- 4
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
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 58
- 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
- A Fielder sequence: a(n) = a(n-1) + a(n-2) + a(n-4).at n=16A001641
- Number of unlabeled connected loop-less graphs on n nodes containing exactly one cycle (of length at least 2) and with all nodes of degree <= 4.at n=12A002094
- Number of partitions of n of the form a_1*b_1^2 + a_2*b_2^2 + ...; number of semisimple rings with p^n elements for any prime p.at n=30A004101
- Theta series of A_7 lattice.at n=8A008447
- Coordination sequence for sigma-CrFe, Position Xf.at n=30A009958
- Even numbers (not equal to 2) to the left of the central elements of the (2,3)-Pascal triangle A029600.at n=23A029613
- Even numbers to right of central numbers of the (3,2)-Pascal triangle A029618.at n=39A029627
- a(n) = 2*n*(4*n + 1).at n=42A033585
- a(n) is the decimal concatenation of n and n^2.at n=13A053061
- Triangle T(n,k) of number of minimal 5-covers of a labeled n-set that cover k points of that set uniquely (k=5,..,n).at n=3A057966
- Number of ways to cover (without overlapping) a ring lattice (necklace) of n sites with molecules that are 5 sites wide.at n=33A058368
- Numbers k such that sigma(x) = k has exactly 8 solutions.at n=35A060664
- Number of 2-trees rooted at any symmetric edge.at n=16A063687
- Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,5.at n=25A064239
- a(n) = 21*n^2.at n=26A064762
- Triangular numbers whose index is a multiple of the sum of their digits.at n=30A067520
- Triangular numbers with sum of digits = 21.at n=11A068131
- Triangular numbers of the form 21*k.at n=32A069499
- Replace all prime factors p of n with n-p.at n=27A072194
- Triangular numbers which are 6-almost primes.at n=11A076580