6795
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 27
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 11856
- Proper Divisor Sum (Aliquot Sum)
- 5061
- 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
- 3600
- Möbius Function
- 0
- Radical
- 2265
- 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
- 36
- 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
- Quadruples of different integers from [ 1,n ] with no common factors between pairs.at n=34A015623
- Relative class number h- of cyclotomic field Q(zeta_m) where m is n-th term of A035113.at n=75A035115
- First gap of n in sequence A038593 (lower terms).at n=17A038661
- Numbers that are divisible by 5 and are the difference between two (different positive) cubes in at least one way.at n=30A038853
- Numbers ending with '5' that are the difference of two positive cubes.at n=21A038860
- Numerators of continued fraction convergents to sqrt(227).at n=2A041422
- For each prime p take the sum of nonprimes < p.at n=31A045717
- Odd numbers with exactly 4 palindromic prime factors (counted with multiplicity).at n=41A046374
- Total number of right truncatable primes in base n.at n=24A076586
- a(n) = A077347(n)^(1/2).at n=45A077349
- Expansion of 1/Product_{ n >= 2, n not of the form 2^k-1 } (1 - x^n).at n=50A078657
- Triangle read by rows: T(n,k) = n*T(n-1,k) + n - k starting at T(n,n)=0.at n=60A081114
- Numbers n such that nextprime(n^3)-prevprime(n^3) = 4.at n=32A090121
- Start with 1 and repeatedly reverse the digits and add 47 to get the next term.at n=22A118145
- a(n) = (7*n^2 + 15*n + 2) / 2.at n=43A131874
- Numbers k such that k * Fibonacci(k) + 1 is prime.at n=38A134313
- (n^4 - 10*n^2 + 15*n - 6)/2.at n=10A135916
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.at n=7A151038
- Row sums of triangle defined in A113821.at n=23A160969
- a(n) = n*(2*n^2 + 5*n + 17)/2.at n=18A163661