16422
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 32
- Divisor Sum
- 41472
- Proper Divisor Sum (Aliquot Sum)
- 25050
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4224
- Möbius Function
- -1
- Radical
- 16422
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 5
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
- 159
- 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
- yes
- Odd
- no
Appears in sequences
- Central factorial numbers: A008955(n,2).at n=6A000596
- Triangle of central factorial numbers |t(2n,2n-2k)| read by rows.at n=38A008955
- Nonsquares with A072594(n) = 0.at n=32A072596
- a(n) = 2^(n+1) - 1 + 3*n.at n=13A131833
- Numbers n with property that for each single digit d of n, we can also see the decimal expansion of 2^d as a substring of n. Also n may not contain any zero digits.at n=7A135016
- Composites one larger than a prime, with exactly five distinct prime factors.at n=33A136154
- a(n) = 7*n*(2*n + 1).at n=34A195026
- Triangle read by rows: matrix inverse of the central factorial numbers T(2*n, 2*k) (A036969).at n=42A204579
- Number of legal 7 X 6 Connect-Four positions after n plies.at n=6A212693
- Numbers n such that n^8 + 1 and (n + 2)^8 + 1 are both prime.at n=36A217972
- Squarefree numbers which yield zero when their prime factors are xored together.at n=10A235488
- Number of partitions p of n such that median(p) <= multiplicity(max(p)).at n=42A240208
- Triangle read by rows: T(n,k) is the coefficient A_k in the transformation Sum_{k=0..n} (k+1)*x^k = Sum_{k=0..n} A_k*(x+2)^k.at n=46A246788
- Number of Dyck paths of semilength n and height exactly 7.at n=5A289420
- Number of nX4 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.at n=8A305448
- First differences of A328078.at n=16A328079
- Nonprime numbers k whose arithmetic derivative k' (A003415) is a Fibonacci number (A000045).at n=35A362141
- Squarefree numbers whose distinct prime factors can be partitioned into two sets with equal sums.at n=40A384498