2134
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 3528
- Proper Divisor Sum (Aliquot Sum)
- 1394
- 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
- 960
- Möbius Function
- -1
- Radical
- 2134
- 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
- 63
- 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
- Number of free planar polyenoids with n nodes and symmetry point group C_{2v}.at n=17A000936
- Number of 5th-order maximal independent sets in path graph.at n=43A007380
- Unique period lengths of primes mentioned in A007615.at n=43A007498
- Coordination sequence occurring in Zeolite Codes AFG, CAN, LIO, LOS.at n=32A008013
- Coordination sequence T2 for Zeolite Code CGF.at n=32A019452
- Nearest integer to Gamma(n + 7/10)/Gamma(7/10).at n=7A020016
- Ceiling of Gamma(n+7/10)/Gamma(7/10).at n=7A020106
- Positive numbers k such that k and 2*k are anagrams in base 6 (written in base 6).at n=1A023064
- n written in fractional base 5/2.at n=49A024632
- a(n) = sum of the numbers between the two n's in A026242.at n=43A026271
- Number of distinct products ijk with 0 <= i < j < k <= n.at n=33A027429
- Sequence satisfies T^2(a)=a, where T is defined below.at n=42A027585
- a(n) = Sum_{k divides 3^n} S(k), where S is the Kempner function A002034.at n=44A029714
- Decimal representation of permutations of lengths 1, 2, 3, ... arranged lexicographically.at n=15A030299
- Least term in period of continued fraction for sqrt(n) is 5.at n=12A031429
- Multiplicity of highest weight (or singular) vectors associated with character chi_7 of Monster module.at n=38A034395
- Multiplicity of highest weight (or singular) vectors associated with character chi_123 of Monster module.at n=38A034511
- Numbers that eventually reach 1 under "x -> sum of cubes of digits of x".at n=37A035504
- Number of partitions of n into parts 3k and 3k+2 with at least one part of each type.at n=44A035619
- Number of partitions of n into parts not of form 4k+2, 16k, 16k+1 or 16k-1.at n=51A036020