6235
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 7920
- Proper Divisor Sum (Aliquot Sum)
- 1685
- 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
- 4704
- Möbius Function
- -1
- Radical
- 6235
- 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
- 186
- 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
- no
- Odd
- yes
Appears in sequences
- Divisors of 2^28 - 1.at n=26A003536
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly seven 1's.at n=29A020443
- a(n) = Sum_{k=1..n} k*[ (n/k)*[ (n/k)*[ n/k ] ] ].at n=15A024933
- dot_product(n,n-1,...2,1)*(6,7,...,n,1,2,3,4,5).at n=23A026063
- a(n) = Sum_{k=0..n-3} T(n,k)*T(n,k+3), T given by A026736.at n=5A027218
- Number of partitions of n such that cn(0,5) = cn(1,5) <= cn(2,5) = cn(4,5) <= cn(3,5).at n=65A036862
- Denominators of continued fraction convergents to sqrt(202).at n=7A041375
- Denominators of continued fraction convergents to sqrt(808).at n=11A042559
- a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 2.at n=14A049921
- Least number k such that phi(k) / Carmichael lambda(k) = 2n.at n=27A066497
- Numbers m that divide binomial(m*(m+1), m+1)/m^2.at n=42A082529
- Number of primes less than 10^n which do not contain the digit 2.at n=4A091636
- Antidiagonal sums of array in A093966.at n=9A093963
- Fourth column of (1,5)-Pascal triangle A096940.at n=28A096941
- Indices of primes in sequence defined by A(0) = 83, A(n) = 10*A(n-1) + 33 for n > 0.at n=18A101074
- Numbers n such that A001414(n) is a golden semiprime, where A001414 is the sum of primes dividing n (with repetition).at n=41A108219
- Sequence S such that 1 is in S and if x is in S, then 6x-1 and 6x+1 are in S.at n=34A147993
- 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), (-1, -1, 1), (0, 0, 1), (0, 1, 0), (1, 0, 0)}.at n=7A151032
- 5 times pentagonal numbers: 5*n*(3*n-1)/2.at n=29A152734
- a(n) = 4*n^2 + 12*n + 3.at n=37A153169