1449
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 2496
- Proper Divisor Sum (Aliquot Sum)
- 1047
- 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
- 792
- Möbius Function
- 0
- Radical
- 483
- 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
- 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
- 140
- Smith Number
- yes
- 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
- Number of nonempty labeled simple graphs on nodes chosen from an n-set.at n=5A004140
- Stella octangula numbers: a(n) = n*(2*n^2 - 1).at n=9A007588
- Duplicate of A034343.at n=9A007669
- Coordination sequence T2 for Zeolite Code MTN.at n=23A008187
- Expansion of e.g.f. arctan(sinh(x) * log(x+1)).at n=7A012513
- Expansion of e.g.f.: tanh(sinh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+12/4!*x^4-40/5!*x^5...at n=7A012515
- Numbers n such that phi(n) * sigma(n) + 4 is a perfect square.at n=33A015727
- Powers of sqrt(2) rounded up.at n=21A017912
- Powers of sqrt(8) rounded up.at n=7A017930
- Powers of fourth root of 2 rounded up.at n=42A018050
- Powers of fourth root of 8 rounded up.at n=14A018068
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEL = ZSM-11 Nan[AlnSi96-nO192] starting with a T1 atom.at n=10A019148
- a(n) = n*(9*n - 1)/2.at n=18A022266
- Number of 3's in n-th term of A006711.at n=31A022479
- 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=47A022954
- Numbers k such that Fibonacci(k) == 34 (mod k).at n=17A023180
- a(n) = [ (2nd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+1 positive integers congruent to 1 mod 4}.at n=37A024385
- T(n,n-2), where T is the array in A026374.at n=35A026381
- a(n) = T(n,n-2), where T is the array in A026386.at n=35A026393
- Coordination sequence T3 for Zeolite Code CGS.at n=28A027367