6266
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 10164
- Proper Divisor Sum (Aliquot Sum)
- 3898
- 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
- 2880
- Möbius Function
- -1
- Radical
- 6266
- Omega Function (Ω)
- 3
- 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
- 124
- 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 partially achiral rooted trees.at n=14A003240
- Truncated octahedral numbers: 16*n^3 - 33*n^2 + 24*n - 6.at n=7A005910
- If a, b in sequence, so is ab+7.at n=45A009312
- Numbers k such that the continued fraction for sqrt(k) has period 9.at n=32A010339
- a(n) = s(n+3)/5, where s is A024729.at n=12A024730
- a(n) = Sum_{k=1..n} k*[ (n/k)*[ n/k ] ].at n=40A024932
- Sorted elements of table (A035002) of a(m,n) = sum(a(m-k,n), k=1..m-1)+sum(a(m,n-k), k=1..n-1).at n=35A035001
- Square array read by antidiagonals: T(m,n) = Sum_{k=1..m-1} T(m-k,n) + Sum_{k=1..n-1} T(m,n-k).at n=59A035002
- Numbers whose sum of reciprocals of digits is the reciprocal of an integer.at n=50A037264
- Sum of reciprocals of digits = 1.at n=32A037268
- Denominators of continued fraction convergents to sqrt(535).at n=9A042023
- Numbers having three 6's in base 10.at n=8A043515
- Harmonic mean of digits is 4.at n=34A062182
- Decimal concatenations of the quadruples (d1,d2,d3,d4) with elements in {2,4,6} for which there exists a prime p >= 5 such that the differences between the 5 consecutive primes starting with p are (d1,d2,d3,d4).at n=16A078868
- Octo numbers (a polygonal sequence): a(n) = 5*n^2 - 6*n + 2 = (n-1)^2 + (2*n-1)^2.at n=35A079273
- Indices of primes in sequence defined by A(0) = 71, A(n) = 10*A(n-1) + 21 for n > 0.at n=19A101137
- Triangle, read by rows, where T(n,k) = Sum_{j=0..n-k-1} C(j+k,j)*T(n-1,j+k) for n>k>=0 with T(n,n)=1.at n=58A101494
- Primitive sliding numbers (excludes multiples of 10): totals, including repetitions, of sums r + s, r >= s, such that 1/r + 1/s = (r + s)/10^k for some k >= 0.at n=26A103184
- Sum of the odd parts in all partitions of n into distinct parts.at n=32A116682
- Number of finite sequences b with b(0) = 1, b(i+1) = b(i)+d where d|b(i), ending with n.at n=20A122205