2635
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
- 3456
- Proper Divisor Sum (Aliquot Sum)
- 821
- 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
- 1920
- Möbius Function
- -1
- Radical
- 2635
- 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
- 53
- 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
- Number of n-bead necklaces with 5 colors.at n=6A001869
- Number of polyhedra with n nodes and n faces.at n=6A002856
- Numbers that are the sum of 10 positive 6th powers.at n=37A003366
- Losing initial positions in game: two players alternate in removing >= 1 stones; last player wins; first player may not remove all stones; each move <= 3 times previous move.at n=23A003411
- Number of ways to color vertices of a hexagon using <= n colors, allowing only rotations.at n=5A006565
- Coordination sequence T2 for Zeolite Code ATS.at n=37A008039
- Coordination sequence T2 for Zeolite Code CAS.at n=32A008064
- Coordination sequence T7 for Zeolite Code MTW.at n=34A008202
- Expansion of (1+x)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=53A008762
- Harmonic Molien series for Conway group Con.0.at n=37A008924
- Number of parts in all partitions of n into distinct parts.at n=34A015723
- Position of numbers of form 3*n^2 in A025060 (numbers of form j*k + k*i + i*j, where 1 <=i < j < k).at n=26A025064
- a(n) = position of the n-th n in A026400.at n=47A026403
- a(n) = position of the n-th n in A026409.at n=47A026412
- Quasi-Carmichael numbers to base 3: squarefree composites n such that prime p|n ==> p-3|n-3.at n=2A029560
- Least term in period of continued fraction for sqrt(n) is 3.at n=40A031427
- Lucky numbers with size of gaps equal to 10 (upper terms).at n=26A031893
- Lucky numbers with size of gaps equal to 12 (lower terms).at n=34A031894
- Numbers with exactly five distinct base-7 digits.at n=31A031984
- Concatenation of n and n + 9 or {n,n+9}.at n=25A032614