16095
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
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 27360
- Proper Divisor Sum (Aliquot Sum)
- 11265
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8064
- Möbius Function
- 1
- Radical
- 16095
- Omega Function (Ω)
- 4
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 45
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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) = ceiling(10000*log(n)).at n=4A004245
- arcsin(tanh(x)+sin(x))=2*x+5/3!*x^3+185/5!*x^5+16095/7!*x^7...at n=3A013130
- Numbers k such that k^2 is composed of three 1-digit-overlapping subsquares.at n=9A048426
- Numbers n such that sigma(n) = phi(n) + phi(n-1) + phi(n-2).at n=10A067202
- Numbers n such that phi(n)+phi(n+1)=n+1.at n=27A067798
- Numbers that define integer Heronian triangles [a(n), prime(a(n)), A068968(n)] with area A068969(n).at n=33A068967
- Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n is neither a prime, nor a true power of prime and n is squarefree. Squarefree solutions of A071140.at n=17A071141
- Numbers n such that (i) the sum of the distinct primes dividing n is divisible by the largest prime dividing n and (ii) n has exactly 4 distinct prime factors and (iii) n is squarefree.at n=5A071143
- Squarefree numbers k such that the largest prime factor of k is equal to the sum of the other prime factors of k.at n=16A071312
- Fractional part of sinh(n) decreases monotonically to zero.at n=11A079038
- Fractional part of cosh(n) decreases monotonically to zero.at n=13A079039
- Integers k such that nextprime(k^5) - prevprime(k^5) = 4.at n=14A090123
- Indices of primes in sequence defined by A(0) = 47, A(n) = 10*A(n-1) - 43 for n > 0.at n=10A101721
- Number of inner dual graphs of planar polyhexes with n hexagons having no nontrivial symmetry.at n=11A108072
- Main diagonal of triangle A127496: a(n) = A127496(n,n) for n>=0.at n=9A127497
- 3 times 10-gonal (or decagonal) numbers: a(n) = 3*n*(4*n-3).at n=37A152767
- Odd long legs `B` of more than one primitive Pythagorean triangle.at n=27A179271
- Total number of odd parts in the last section of the set of partitions of n.at n=33A206433
- Numbers k such that phi(k) = phi(k+2) - phi(k+1).at n=23A229552
- Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z.at n=28A241883