1972
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 3780
- Proper Divisor Sum (Aliquot Sum)
- 1808
- 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
- 896
- Möbius Function
- 0
- Radical
- 986
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 50
- 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
- High temperature series for spin-1/2 Ising magnetic susceptibility on 2D square lattice.at n=7A002906
- Numbers that are the sum of 12 positive 6th powers.at n=33A003368
- Coordination sequence T2 for Zeolite Code ATS.at n=32A008039
- Coordination sequence T3 for Zeolite Code ATS.at n=32A008040
- Coordination sequence T1 for Zeolite Code GOO.at n=30A008111
- Coordination sequence T3 for Zeolite Code MTN.at n=27A008188
- Erroneous version of A002906.at n=2A008547
- Number of recursive calls needed to compute the n-th Fibonacci number F(n), starting with F(1) = F(2) = 1.at n=15A019274
- Numbers k such that the continued fraction for sqrt(k) has period 22.at n=42A020361
- Number of isomorphism types of symmetric configurations n_4.at n=4A023994
- Numbers that are the sum of 4 distinct positive cubes in exactly 2 ways.at n=21A025409
- Numbers that are the sum of 4 distinct positive cubes in 2 or more ways.at n=22A025412
- 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 22.at n=25A031520
- Numbers k such that 81*2^k+1 is prime.at n=38A032390
- Take list of cubes, move left digit of each term to end of previous term.at n=14A032761
- Fractional part of square root of a(n) starts with 4: first term of runs.at n=43A034110
- Multiplicity of highest weight (or singular) vectors associated with character chi_183 of Monster module.at n=37A034571
- Composite numbers k such that digits in k and in juxtaposition of prime factors of k are the same (apart from multiplicity).at n=6A035141
- Number of asymmetric orthoplex n-ominoes in n-2 space.at n=8A036369
- Number of binary rooted trees with n nodes and height at most 7.at n=14A036590