14718
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
- 16
- Divisor Sum
- 32256
- Proper Divisor Sum (Aliquot Sum)
- 17538
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4440
- Möbius Function
- 1
- Radical
- 14718
- Omega Function (Ω)
- 4
- 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
- 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
- 146
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- yes
- Odd
- no
Appears in sequences
- Number of series-reduced planted trees with n+9 nodes and 4 internal nodes.at n=31A001860
- Coordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.at n=11A008528
- Coordination sequence for Cr3Si, Cr position.at n=31A009928
- a(n) = n*(27*n + 1)/2.at n=33A022285
- Number of partitions of n such that cn(0,5) = cn(2,5) < cn(3,5) = cn(4,5) <= cn(1,5).at n=65A036854
- Lesser members of g-reduced amicable pairs a < b such that sigma(a) = sigma(b) = a + b + gcd(a,b).at n=37A054573
- Result of using the primes as coefficients in an infinite polynomial series in x and then expressing this series as (1+x)(1+a(1)*x)(1+a(2)*x^2) ... .at n=34A147541
- (A178476(n)-3)/9.at n=25A178486
- G.f.: A(x) = exp( Sum_{n>=1} A((-1)^n*x)^n * x^n/n ).at n=17A229116
- Numbers k with property that for every base b >= 2, there is a number m such that m+s(m) = k, where s(m) = sum of digits in the base-b expansion of m.at n=44A230624
- Numbers generated by a Fibonacci-like sequence in which zeros are suppressed.at n=27A243063
- Sum of the common path length over all 2-tuples of nodes in a complete binary tree of height n.at n=6A286778
- Numbers k such that Bernoulli number B_{k} has denominator 64722.at n=12A295592
- Indices i in A112058 where records of 17*i - 3*A112058(i)/8 occur.at n=27A298991
- Number of 3Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=13A302213
- Number of 5-element subsets of [n] having a prime element sum.at n=21A320680
- Numbers k such that k and k+1 are both terms in A377732.at n=20A377733
- a(n) = Sum_{k=0..floor(2*n/5)} binomial(k+2,2) * binomial(k,2*n-5*k).at n=28A392270