4650
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 11904
- Proper Divisor Sum (Aliquot Sum)
- 7254
- 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
- 1200
- Möbius Function
- 0
- Radical
- 930
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 121
- 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
- Number of factorization patterns of polynomials of degree n over integers.at n=17A006171
- a(n) = lcm(n, sigma(n)).at n=49A009242
- a(n) = floor(n*(n - 1)*(n - 2)/32).at n=54A011914
- Numbers k such that k | (phi(k) * sigma(k)) but (phi(k) + sigma(k))/k does not increase.at n=37A015708
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence).at n=18A024689
- Theta series of 6-dimensional 11-modular even lattice of minimal norm 4.at n=37A029586
- Number of mono-4-polyhexes with n cells.at n=8A038392
- Base-9 palindromes that start with 6.at n=14A043033
- Same as A038392 except for initial term.at n=8A044045
- Numbers whose base-4 representation contains exactly two 0's and four 2's.at n=11A045051
- a(0) = 0; for n>0, a(n) = maximal number of regions into which space can be divided by n spheres.at n=25A046127
- Numbers k such that the sum of the squares of the divisors of k is divisible by k.at n=20A046762
- Numbers n such that n | sigma_10(n).at n=36A055714
- Numbers k such that 7*10^k + 1 is prime.at n=15A056804
- a(n) is smallest positive integer, distinct from any terms earlier in the sequence, such that (sum{k=1 to n}[a(k)]) divides (product{k=1 to n}[a(k)])*(sum{k=1 to n}[1/a(k)]).at n=39A058330
- Numbers k such that k! - prime(k) is prime.at n=30A064401
- Areas of integer Heronian triangles [A068967(n), prime(A068967(n)), A068968(n)].at n=8A068969
- Numbers n such that n*sigma(n) is a perfect square.at n=11A069070
- (Sum of digits of n)^5 - (sum of digits^5 of n).at n=15A069965
- Numbers k such that k-1, k+1 and k^2+1 are prime numbers.at n=16A070155