12059
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12480
- Proper Divisor Sum (Aliquot Sum)
- 421
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11640
- Möbius Function
- 1
- Radical
- 12059
- Omega Function (Ω)
- 2
- 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
- 187
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 where |cos(k)| (or |cosec(k)| or |cot(k)|) decreases monotonically to 0; also numbers k where |tan(k)| (or |sec(k)|, or |sin(k)|) increases.at n=39A004112
- Base-7 palindromes that start with 5.at n=17A043019
- Numbers k where cos(k) decreases monotonically to 0.at n=20A046957
- Numbers k where sin(k) increases monotonically to 1 (or cosec(k) decreases).at n=24A046959
- Numbers n such that n*6^n - 1 is prime.at n=16A059675
- Poincaré series [or Poincare series] (or Molien series) for a certain four-fold wreath product P_4.at n=46A091434
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111-0100 pattern in any orientation.at n=10A146832
- 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, 1), (0, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.at n=7A151058
- a(n) = 2*a(n-1) + a(n-2) for n > 1; a(0) = 3, a(1) = 11.at n=9A164303
- Least semiprime whose prime factors differ by 2*prime(n).at n=40A190664
- Lengths of runs of identical terms in A253443.at n=36A253444
- Number of aperiodic necklaces (Lyndon words) with k<=6 black beads and n-k white beads.at n=26A277631
- Indices i in A112058 where records of 17*i - 3*A112058(i)/8 occur.at n=16A298991
- a(1) = 1; a(n) = -Sum_{k=2..n} k^3 * a(floor(n/k)).at n=21A360658