4535
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5448
- Proper Divisor Sum (Aliquot Sum)
- 913
- 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
- 3624
- Möbius Function
- 1
- Radical
- 4535
- Omega Function (Ω)
- 2
- 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
- 90
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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 topologies, or transitive digraphs with n unlabeled nodes.at n=7A001930
- Coordination sequence T2 for Zeolite Code NES.at n=43A008206
- Coordination sequence for sigma-CrFe, Position Xa.at n=17A009962
- n written in fractional base 7/4.at n=47A024641
- Coordination sequence T3 for Zeolite Code ITE.at n=46A027371
- Number of prime unlabeled topologies (i.e., prime homeomorphism classes) on n points.at n=5A028855
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 13.at n=37A031511
- Trajectory of 3 under map n->17n+1 if n odd, n->n/2 if n even.at n=20A037106
- a(n) = Sum_{i=0..floor(n/2)} T(2i,n-2i) where T is A049615.at n=48A049618
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 20.at n=33A051985
- Concatenation of n in base 10 down up to base 2 is prime, all numbers are interpreted as decimals.at n=41A054257
- Convolution of Fibonacci F(n+1), n>=0, with F(n+6), n>=0.at n=9A067334
- a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].at n=30A072921
- Interprimes which are of the form s*prime, s=5.at n=12A075280
- A000041(n) - A000203(n).at n=28A086738
- a(n) = {A089713(n)+A070219(n)}/2.at n=42A089715
- a(1) = 1, a(2) = 2; for n >= 2, a(n+1) = a(n) + sum of the unique prime factors of a(n).at n=16A096460
- Number of rooted directed trees on n nodes with a green root.at n=4A097628
- Triangle T, read by rows, such that column k equals column 0 of T^(k+1), where column 0 of T allows the n-th row sums to be zero for n>0 and where T^k is the k-th power of T as a lower triangular matrix.at n=38A101897
- Column 2 of triangular matrix A101897, in which column k equals column 0 of A101897^(k+1) and where the n-th row sums are zero for n>0.at n=6A101899