16736
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
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 33012
- Proper Divisor Sum (Aliquot Sum)
- 16276
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8352
- Möbius Function
- 0
- Radical
- 1046
- Omega Function (Ω)
- 6
- 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
- 128
- 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
- Coordination sequence for Ni2In, Position Ni2.at n=39A009942
- Expansion of 1/(1-x^2-x^3-x^4-x^5-x^6-x^7-x^8-x^9-x^10).at n=23A013987
- n*10^6-1, n*10^6-3, n*10^6-7 and n*10^6-9 are all prime.at n=2A064980
- Numbers n such that n and 2^n end with the same three digits.at n=16A067866
- Expansion of (1-x)/(1-2*x+2*x^2+2*x^3).at n=16A078005
- Number of base 30 n-digit numbers with adjacent digits differing by two or less.at n=5A126417
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.at n=7A151022
- Numbers n with property that concatenation (2*n+1)//n of the decimals is a square.at n=6A176185
- Molecular topological indices of the n X n grid graphs.at n=4A192828
- Number of (w,x,y,z) with all terms in {1,...,n} and w+x+y=|x-y|+|y-z|.at n=40A212678
- a(n) is the least value of k such that the decimal expansion of n^k contains nine consecutive identical digits.at n=20A217164
- Number of length n+2 0..5 arrays with no three unequal elements in a row and new values 0..5 introduced in 0..5 order.at n=9A243636
- Number of parity-alternating permutations of [n] avoiding the pattern 321.at n=17A354208
- Number of parity-alternating permutations of [n] avoiding the pattern 123.at n=17A355089
- a(n) is the least number that is the sum of the nonprime divisors of k for exactly n different k.at n=7A376156