16041
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 21392
- Proper Divisor Sum (Aliquot Sum)
- 5351
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10692
- Möbius Function
- 1
- Radical
- 16041
- 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
- 102
- 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
- a(n) = 4^n - n^3.at n=7A024039
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 84.at n=33A031582
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 68 ones.at n=26A031836
- Numbers k such that T(k) = T(A072522(k)) + T(A072522(k+1)), T(i) being the triangular numbers.at n=25A080824
- Numbers k such that (k!-4)/4 is prime.at n=19A139199
- Partial sums of A160414.at n=25A161325
- G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{d|n} A(n*x/d)^d/d]*x^n ).at n=7A162286
- Monotonic ordering of nonnegative differences 2^i-7^j, for 40>=i>=0, j>=0.at n=41A192118
- Monotonic ordering of nonnegative differences 4^i-7^j, for 40>= i>=0, j>=0.at n=19A192165
- Numbers k such that A248891(k) = 2.at n=21A248902
- Numbers k for which A354102(k) = A354102(sigma(k)).at n=15A354106