16248
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 40680
- Proper Divisor Sum (Aliquot Sum)
- 24432
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5408
- Möbius Function
- 0
- Radical
- 4062
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 66
- 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
- Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 2,0,3,1.at n=5A037725
- a(n) = Sum_{k=1..n} lcm(k,n)/gcd(k,n).at n=37A056789
- Square of the Euclidean length of the vector of Littlewood-Richardson coefficients of Sum_{lambda |- n} s_lambda^2, where s_lambda are the symmetric Schur functions and the sum runs over all partitions lambda of n.at n=8A067855
- Expansion of theta_3(q) / theta_3(q^2) in powers of q.at n=40A080015
- G.f.: Product_{n >= 0} (1+x^(2n+1))/(1-x^(2n+1)).at n=40A080054
- Structured pentagonal icositetrahedral numbers (vertex structure 10).at n=11A100168
- Expansion of f(-q) / f(q) in powers of q where f() is a Ramanujan theta function.at n=40A108494
- Values of n such that n^a-+a are primes, a=5.at n=17A155021
- The number of even entries in all the 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.at n=7A181298
- Numbers divisible by at least four of their digits, different and >1.at n=38A187238
- Expansion of phi(q^2) / phi(-q) in powers of q where phi() is a Ramanujan theta function.at n=20A208850
- Expansion of phi(-q) / phi(q^2) in powers of q where phi() is a Ramanujan theta function.at n=40A210030
- Expansion of phi(q^2) / phi(q) in powers of q where phi() is a Ramanujan theta function.at n=20A210065
- Sum_{i=0..n} Sum_{j=0..n} (i AND j), where AND is the binary logical AND operator.at n=44A224924
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 377", based on the 5-celled von Neumann neighborhood.at n=13A281630
- Solution of the complementary equation a(n) = 2*a(n-1) - a(n-2) + b(n-1), where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=42A294866
- Number of nX3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=5A296381
- Number of nX6 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=2A296384
- T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=30A296386
- T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 2 neighboring 1s.at n=33A296386