2682
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 5850
- Proper Divisor Sum (Aliquot Sum)
- 3168
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 888
- Möbius Function
- 0
- Radical
- 894
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 71
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence T5 for Zeolite Code NES.at n=33A008209
- Coordination sequence T1 for Milarite.at n=32A008256
- Coordination sequence T2 for Zeolite Code -ROG.at n=39A009860
- Coordination sequence T7 for Zeolite Code VNI.at n=32A009913
- a(n) = s(n+3)/3, where s is A024737.at n=7A024738
- a(n) = position of 3*(n^2) in A000408.at n=32A024800
- a(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=3 and a(2)=a(3)=1.at n=9A024958
- a(n) = position of 3*n^2 in sequence A025051 (numbers of form j*k + k*i + i*j, without repetitions, where 1 <= i <= j <= k).at n=29A025056
- Molien series for Hecke group H_{3,4}.at n=15A027631
- a(n)=(s(n)+3)/8, where s(n)=n-th base 8 palindrome that starts with 5.at n=33A043069
- Numbers k such that string 1,0 occurs in the base 9 representation of k but not of k-1.at n=32A044260
- Numbers n such that string 6,1 occurs in the base 9 representation of n but not of n-1.at n=36A044306
- Numbers n such that string 8,2 occurs in the base 10 representation of n but not of n-1.at n=28A044414
- Numbers k such that string 1,0 occurs in the base 9 representation of k but not of k+1.at n=32A044641
- Numbers n such that string 8,2 occurs in the base 10 representation of n but not of n+1.at n=28A044795
- Numbers whose base-4 representation contains no 0's and exactly four 2's.at n=34A045041
- Numbers whose base-4 representation contains exactly one 1 and four 2's.at n=35A045094
- Numbers whose base-4 representation contains exactly four 2's and one 3.at n=23A045154
- Coordination sequence T1 for Zeolite Code DON.at n=35A047953
- Coordination sequence T4 for Zeolite Code DON.at n=35A047956