4052
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 7098
- Proper Divisor Sum (Aliquot Sum)
- 3046
- 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
- 2024
- Möbius Function
- 0
- Radical
- 2026
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 2
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
- 113
- 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
- Nearest integer to sinh(n).at n=9A000495
- Nearest integer to cosh(n).at n=9A002459
- Number of points on surface of tetrahedron; coordination sequence for sodalite net (equals 2*n^2+2 for n > 0).at n=45A005893
- 'Eban' numbers (the letter 'e' is banned!).at n=52A006933
- Coordination sequence T1 for Zeolite Code GME and AFX.at n=48A008110
- Coordination sequence T3 for Zeolite Code MTT.at n=39A008191
- Coordination sequence T1 for Zeolite Code GIS.at n=47A008266
- Coordination sequence for NiAs(2), Ni position.at n=30A009946
- a(0) = 1, a(n) = 18*n^2 + 2 for n>0.at n=15A010008
- Phi(n) + 5 | sigma(n + 5).at n=43A015784
- Expansion of tan(tan(x)*sin(x))/2.at n=4A024245
- a(n) = (d(n)-r(n))/5, where d = A026057 and r is the periodic sequence with fundamental period (1,0,3,1,0).at n=42A026059
- Numbers whose base-5 representation contains exactly two 1's and three 2's.at n=16A045228
- a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = a(3) = 1.at n=14A049886
- Number of positive integers <= 2^n of form 5 x^2 + 10 y^2.at n=16A054180
- Composite n such that phi(n+2) = phi(n)+2.at n=41A056774
- Smallest number m such that m^2+1 is divisible by A002144(n)^2 (= squares of primes congruent to 1 mod 4).at n=10A059321
- Number of representations of n as a sum of products of positive integers. 1 is not allowed as a factor, unless it is the only factor. Representations which differ only in the order of terms or factors are considered equivalent.at n=23A066739
- Sides of integer Heronian triangles [prime(A068964(n)), prime(A068964(n)+1), a(n)] with area A068966(n).at n=6A068965
- a(n+1) = a(n)+greatest prime divisor of a(n-1).at n=36A078695