14535
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 28080
- Proper Divisor Sum (Aliquot Sum)
- 13545
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6912
- Möbius Function
- 0
- Radical
- 4845
- Omega Function (Ω)
- 5
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 164
- 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
- no
- Odd
- yes
Appears in sequences
- a(n) = floor(binomial(n,7)/8).at n=21A011844
- Triangle of Gaussian (or q-binomial) coefficients for q = -2.at n=52A015109
- Triangle of Gaussian (or q-binomial) coefficients for q = -2.at n=47A015109
- Gaussian binomial coefficient [ n,2 ] for q = -2.at n=7A015249
- Gaussian binomial coefficient [ n,7 ] for q = -2.at n=2A015338
- Sequence satisfies T^2(a)=a, where T is defined below.at n=50A027593
- a(n) = (2*n-1)*(4*n-1).at n=43A033567
- Tritriangular numbers: a(n) = binomial(binomial(n,2),2) = n*(n+1)*(n-1)*(n-2)/8.at n=19A050534
- Denominators of row 4 of table described in A051714/A051715.at n=15A051723
- a(n) = ceiling(binomial(n,8)/n).at n=21A053731
- Numbers n such that sigma(n)^2 - phi(n)^2 is a perfect square.at n=36A057654
- Number of non-factorable subsets of size >= 2 of a 1 X n uniform grid.at n=13A057750
- Consider 2n tennis players; a(n) is the number of matches needed to let every possible pair play each other.at n=8A062346
- Triangular numbers such that the product of digits is also a (positive) triangular number.at n=13A069077
- Triangular numbers which are 5-almost primes.at n=34A076579
- Exponential self-convolution of Jacobsthal numbers (divided by 2).at n=9A084152
- Jacobsthal oblong numbers.at n=8A084175
- Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded.at n=15A085844
- Triangle read by rows: T(n,k) is the number of ordered trees with n edges and k branches.at n=63A091187
- Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k peaks at even height.at n=57A091869