2412
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
- 2
Divisibility
- Divisor Count
- 18
- Divisor Sum
- 6188
- Proper Divisor Sum (Aliquot Sum)
- 3776
- 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
- 792
- Möbius Function
- 0
- Radical
- 402
- Omega Function (Ω)
- 5
- 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
- Expansion of x^3*(5-2*x)*(1-x^3)/(1-x)^4.at n=22A000338
- Number of n-node unrooted steric quartic trees; number of n-carbon alkanes C(n)H(2n+2) taking stereoisomers into account.at n=13A000628
- Number of 2n-step polygons on cubic lattice.at n=5A001409
- Number of partitions of n into parts of sizes {a( )} is a(n).at n=40A007209
- Coordination sequence T1 for Zeolite Code AFG.at n=34A008012
- Coordination sequence T4 for Zeolite Code BOG.at n=35A008052
- Least k such that k and 4k are anagrams in base n (written in base 10).at n=32A023096
- Coordination sequence T4 for Zeolite Code MWW.at n=33A024989
- Numbers with 18 divisors.at n=40A030636
- 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 24.at n=27A031522
- Base 5 digital convolution sequence.at n=11A033642
- Number of n-node rooted identity trees of height at most 5.at n=17A038084
- Denominators of continued fraction convergents to sqrt(679).at n=5A042305
- Base-8 palindromes that start with 4.at n=15A043024
- Numbers n such that string 2,7 occurs in the base 9 representation of n but not of n-1.at n=33A044276
- Numbers n such that string 7,0 occurs in the base 9 representation of n but not of n-1.at n=32A044314
- Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n-1.at n=27A044344
- Numbers n such that string 7,0 occurs in the base 9 representation of n but not of n+1.at n=32A044695
- Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n+1.at n=27A044725
- a(n)=T(n+1,n), array T given by A048225.at n=43A048230