4556
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 8568
- Proper Divisor Sum (Aliquot Sum)
- 4012
- 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
- 2112
- Möbius Function
- 0
- Radical
- 2278
- 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
- yes
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 59
- 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
- a(n) = (3*n+1)*(3*n+2).at n=22A001504
- a(n) = 2*n*(2*n-1).at n=34A002939
- Coefficient of x^4 in expansion of (1+x+x^2)^n.at n=15A005712
- Coordination sequence T3 for Zeolite Code HEU.at n=44A008118
- Coordination sequence T2 for Zeolite Code JBW.at n=45A008122
- Coordination sequence for MgZn2, Position Zn2.at n=17A009938
- a(1) = 3; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=28A025004
- Distinct even elements in 3-Pascal triangle A028262 (by row).at n=40A028269
- Even elements to right of central elements in 3-Pascal triangle A028262.at n=37A028273
- Every run of digits of n in base 16 has length 2.at n=26A033014
- Product of a prime and the following number.at n=18A036690
- Number of partitions of n such that cn(3,5) <= cn(0,5) = cn(1,5) < cn(2,5) = cn(4,5).at n=67A036868
- Numbers whose base-7 representation contains exactly three 6's.at n=31A043419
- Numbers having three 2's in base 9.at n=29A043463
- Positive integers having more base-16 runs of even length than odd.at n=27A044842
- Numbers whose base-3 representation contains exactly four 0's and no 1's.at n=26A044985
- Numbers whose base-3 representation contains exactly four 0's and four 2's.at n=5A045013
- Number of 2n-bead balanced binary strings, rotationally equivalent to reversed complement.at n=9A045655
- Starting from generation 5 add previous and next term yielding generation 6.at n=33A048452
- Composite numbers n such that sigma(n)+12 = sigma(n+12).at n=6A054902