2094
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4200
- Proper Divisor Sum (Aliquot Sum)
- 2106
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 696
- Möbius Function
- -1
- Radical
- 2094
- 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
- 125
- 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
- Euler transform of A000579.at n=5A000428
- Numbers k such that k^64 + 1 is prime.at n=19A006316
- Series for second parallel moment of square lattice (eventually changes sign).at n=5A006729
- Coordination sequence T1 for Zeolite Code FER.at n=28A008106
- a(n) = (n-dimensional partitions of 6) + C(n,4) + C(n,3).at n=7A008780
- Coordination sequence T3 for Zeolite Code DFO.at n=35A009877
- Coordination sequence T2 for Zeolite Code VNI.at n=28A009908
- Expansion of 1/(1-x^6-x^7-x^8-x^9).at n=51A017849
- Numbers k such that the continued fraction for sqrt(k) has period 32.at n=29A020371
- Tri-substituted alkanes of form C_n H_{2n-1} X_2 Y, or equivalently bi-substituted alkyls of form -C_n H_{2n-1} X_2 (n=1: CHXXY; n=2: CXXY-CHHH CXYH-CXHH CXXH-CYHH).at n=8A022014
- a(n) = n*(29*n + 1)/2.at n=12A022287
- Numbers k such that Fibonacci(k) == 8 (mod k).at n=18A023177
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 16 (most significant digit on right).at n=20A029509
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 30.at n=16A031528
- Coordination sequence T8 for Zeolite Code SFF.at n=30A038435
- Number of partitions satisfying cn(2,5) + cn(3,5) <= 1.at n=33A039857
- a(n) = (s(n)+1)/7, where s(n) = n-th base 7 palindrome that starts with 6.at n=21A043064
- Numbers n such that string 5,6 occurs in the base 8 representation of n but not of n-1.at n=36A044233
- Numbers k such that the string 7,6 occurs in the base 9 representation of k but not of k-1.at n=28A044320
- Numbers n such that string 9,4 occurs in the base 10 representation of n but not of n-1.at n=22A044426