2061
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 2990
- Proper Divisor Sum (Aliquot Sum)
- 929
- 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
- 1368
- Möbius Function
- 0
- Radical
- 687
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 125
- 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
- Squares written in base 7.at n=26A002440
- Cubes written in base 7.at n=8A004637
- Powers of 3 written in base 7.at n=6A004661
- Coordination sequence T1 for Zeolite Code ATV.at n=29A008043
- Coordination sequence T2 for Zeolite Code MEI.at n=33A008147
- Coordination sequence T12 for Zeolite Code MFI.at n=29A008164
- Coordination sequence T4 for Zeolite Code MFI.at n=29A008167
- Coordination sequence T2 for Zeolite Code MTW.at n=30A008197
- Expansion of g.f.: x^4/((1-x)*(1-x^2)^2*(1-x^3)).at n=53A008763
- Coordination sequence T3 for Zeolite Code -CLO.at n=40A009852
- Coordination sequence T1 for Zeolite Code CON.at n=32A009868
- Sum of squares of first n positive integers congruent to 1 mod 3.at n=8A024215
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = A001950 (upper Wythoff sequence).at n=50A024374
- Numbers whose set of base-6 digits is {1,3}.at n=43A032913
- Fibonacci iteration starting with (1, a(n)) leads to a "nine digits anagram".at n=3A034587
- Numbers n such that fractional part of e^(Pi*sqrt(n)) > 0.99.at n=37A035484
- Coordination sequence T14 for Zeolite Code STT.at n=30A038430
- The sequence e, given that c is a left shift by one place of b.at n=51A041003
- a(n)=(s(n)+8)/10, where s(n)=n-th base 10 palindrome that starts with 2.at n=28A043081
- Numbers k such that 1 and 6 occur juxtaposed in the base-10 representation of k but not of k-1.at n=40A043229