4850
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 9114
- Proper Divisor Sum (Aliquot Sum)
- 4264
- 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
- 1920
- Möbius Function
- 0
- Radical
- 970
- 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
- 165
- 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
- Wedderburn-Etherington numbers: unlabeled binary rooted trees (every node has outdegree 0 or 2) with n endpoints (and 2n-1 nodes in all).at n=15A001190
- Number of atomic species of degree n; also number of connected permutation groups of degree n.at n=12A005226
- Coordination sequence for Ni2In, Position Ni1 and In.at n=21A009941
- a(n) = prime(n)*(prime(n+1)-1)/2.at n=24A014303
- A B_2 sequence: a(n) is the least value such that sequence increases and pairwise sums of elements are all distinct.at n=49A025582
- Expansion of 1/((1-2x)(1-5x)(1-8x)(1-9x)).at n=3A025997
- Numbers k such that 255*2^k+1 is prime.at n=29A032504
- Number of n-node rooted unlabeled trees with outdegree <= 2 and exactly 1 edge at the root.at n=15A036656
- Composite numbers n such that sigma(n)+6 = sigma(n+6), where sigma=A000203.at n=4A054903
- Numbers n such that n | 5^n + 4^n + 3^n.at n=18A057236
- Coefficient triangle of polynomials (falling powers) related to Fibonacci convolutions. Companion triangle to A057282.at n=8A057281
- Coefficient triangle of polynomials (rising powers) related to Fibonacci convolutions. Companion triangle to A057280.at n=7A057995
- First of 3 consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2} are in A067259.at n=24A071319
- Index of smallest triangular number beginning with the n-th triangular number other than itself.at n=47A072518
- Sum of first n 6-almost primes.at n=15A086052
- This table shows the coefficients of combinatorial formulas needed for generating the sequential sums of p-th powers of binomial coefficients C(n,6). The p-th row (p>=1) contains a(i,p) for i=1 to 6*p-5, where a(i,p) satisfies Sum_{i=1..n} C(i+5,6)^p = 7 * C(n+6,7) * Sum_{i=1..6*p-5} a(i,p) * C(n-1,i-1)/(i+6).at n=11A087110
- Main diagonal of A101858.at n=36A101863
- Positions of 9 in partition of decimal expansion of Pi A104807.at n=14A104809
- Sum of n-th prime squared and n-th perfect square.at n=18A106587
- Expansion of (1-x-2x^2+sqrt(1-2x-3x^2))/(2*(1-2x-3x^2)).at n=9A116410