14205
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
- 8
- Divisor Sum
- 22752
- Proper Divisor Sum (Aliquot Sum)
- 8547
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 7568
- Möbius Function
- -1
- Radical
- 14205
- 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
- 89
- 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
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 5.at n=17A038636
- Numbers whose base-4 representation contains exactly three 1's and four 3's.at n=21A045128
- Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 13 (most significant digit on right).at n=9A061966
- a(n) = n*(12*n^3 + 10*n^2 - 9*n - 7)/6.at n=9A172080
- Irregular triangle in which row n has numbers k such that prime(n) divides A001008(k), the numerator of the k-th harmonic number.at n=49A229493
- Number of nX2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=10A241249
- The icosagen sequence : a(n) = A018227(n)-5, for n >= 2.at n=40A271997
- Numbers m such that psi(x) = phi(m) has a solution while sigma(y) = phi(m) has none.at n=13A291524
- Partial sums of A299277.at n=24A299278
- Number of factorizations of 2^n into factors > 1 with integer average.at n=45A326667
- a(n) = Sum_{k=0..n} floor(sqrt(k))^5.at n=25A363499
- Least number k such that the concatenation of n consecutive numbers from k to k+n-1 is divisible by their sum.at n=45A375728