16385
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 20520
- Proper Divisor Sum (Aliquot Sum)
- 4135
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 12544
- Möbius Function
- -1
- Radical
- 16385
- Omega Function (Ω)
- 3
- 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
- 53
- 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) = 2^n + 1.at n=14A000051
- Numbers that are the sum of 2 positive 7th powers.at n=6A003369
- Divisors of 2^28 - 1.at n=32A003536
- Numbers that are the sum of 9 positive 11th powers.at n=8A004820
- Numbers that are the sum of at most 2 positive 7th powers.at n=11A004864
- Numbers that are the sum of at most 3 positive 7th powers.at n=21A004865
- Numbers that are the sum of at most 4 positive 7th powers.at n=36A004866
- Inverse of the Doudna sequence A005940.at n=46A005941
- a(n) = sigma_14(n), the sum of the 14th powers of the divisors of n.at n=1A013962
- Jacobsthal-Lucas numbers.at n=14A014551
- Numerator of sum of -14th powers of divisors of n.at n=1A017691
- Pisot sequence L(5,9).at n=12A020737
- Least m such that if r and s in {1/1, 1/4, 1/9,..., 1/n^2} satisfy r < s, then r < k/m < s for some integer k.at n=35A024827
- a(n) = [ 2nd elementary symmetric function of {sqrt(k+1)} ], k = 1,2,...,n.at n=39A025219
- Numbers k such that k^2 is palindromic in base 4.at n=21A029986
- Sum of seventh powers of unitary divisors.at n=3A034681
- Centered cube numbers: a(n) = (n+1)^14 + n^14.at n=1A036092
- Sums of 2 distinct powers of 4.at n=21A038470
- Numbers whose cube is palindromic in base 4.at n=8A046231
- Pisot sequence L(3,5).at n=13A048578