3144
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 7920
- Proper Divisor Sum (Aliquot Sum)
- 4776
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1040
- Möbius Function
- 0
- Radical
- 786
- Omega Function (Ω)
- 5
- 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
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 61
- 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
- Number of directed rooted trees with n nodes.at n=5A006964
- Coordination sequence T1 for Zeolite Code AST.at n=41A008036
- Coordination sequence T6 for Zeolite Code EUO.at n=35A008101
- Coordination sequence T2 for Zeolite Code MEL.at n=36A008151
- Expansion of e.g.f.: tan(x)*exp(tanh(x)).at n=8A009738
- Coordination sequence for MgNi2, Position Ni1.at n=14A009933
- Number of directed rooted trees on n nodes with forbidden limbs.at n=6A014276
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RON = Roggianite Ca16[Be8Al16Si32O104(OH)16].19H2O starting with a T4 atom.at n=15A019216
- Numbers k such that k^2+k+9 is a palindrome.at n=19A027726
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 14.at n=7A031692
- Numbers whose set of base-7 digits is {1,2}.at n=38A032928
- a(1)=1, a(2)=2, a(3)=3; for n >= 3, a(n) is smallest number such that all a(i) for 1 <= i <= n are distinct, all a(i)+a(j) for 1 <= i < j <= n are distinct and all a(i)+a(j)+a(k) for 1 <= i < j < k <= n are distinct.at n=17A036241
- Denominators of continued fraction convergents to sqrt(877).at n=12A042695
- Numerators of continued fraction convergents to sqrt(969).at n=4A042874
- Numbers whose base-7 representation contains exactly four 1's.at n=20A043400
- Numbers n such that string 4,4 occurs in the base 10 representation of n but not of n-1.at n=31A044376
- Numbers n such that string 4,4 occurs in the base 10 representation of n but not of n+1.at n=31A044757
- Numbers whose base-5 representation contains exactly three 0's and one 1.at n=30A045170
- Numbers whose base-5 representation contains exactly three 0's and one 3.at n=29A045200
- Numbers whose base-5 representation contains exactly three 0's and one 4.at n=27A045215