16049
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 17520
- Proper Divisor Sum (Aliquot Sum)
- 1471
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14580
- Möbius Function
- 1
- Radical
- 16049
- Omega Function (Ω)
- 2
- 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
- 45
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers n such that determinant[{{n, sigma(n)}, {n+1, sigma(n+1)}}] is a perfect square.at n=4A067572
- a(n) = least k > 0 such that prime(k) == n (mod k).at n=18A073325
- Number of strings of numbers x(i=1..7) in 0..n with sum i*x(i)^3 equal to 7*n^3.at n=17A184724
- Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 5.at n=39A245145
- Index of n in A125718, or 0 if n does not occur; A125718(k) = least number congruent to prime(k) (mod k) and not occurring earlier.at n=17A249678
- Expansion of Sum_{k>=1} (x/(1 - x))^(k*(k+1)/2).at n=16A280352
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 286", based on the 5-celled von Neumann neighborhood.at n=26A287480
- Record high points in A336957.at n=50A337646