11539
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12600
- Proper Divisor Sum (Aliquot Sum)
- 1061
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10480
- Möbius Function
- 1
- Radical
- 11539
- 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
- 174
- 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
- Number of partitions of n with equal nonzero number of parts congruent to each of 1 and 2 (mod 5).at n=48A035566
- Numbers k such that binomial(6k, k) + 1 is prime.at n=19A125245
- Analog of A006684 for the 7x+1 problem (cf. A133421).at n=18A133425
- Number of permutations of {1,2,...,n} containing exactly 5 occurrences of the pattern 132.at n=4A138163
- Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1111-1000 pattern in any orientation.at n=10A146840
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 595", based on the 5-celled von Neumann neighborhood.at n=22A273142
- Numbers whose septenary, octal and nonary representations are prime when read in decimal.at n=14A281252
- Numbers k such that (865*10^k - 1)/9 is prime.at n=18A294943
- Total sum of the hook lengths over all partitions of 2n-1 having exactly n parts.at n=12A301499
- Number of compositions of n with no part divisible by the next.at n=26A328460
- Triangle read by rows: T(n,k) is the number of planar tanglegrams of size n with 0 <= k < n leaf-matched pairs. A leaf matched pair is a pair of non-leaf vertices (u,v) in the tanglegram such that the induced subtrees rooted and u and v also form a tanglegram (equivalently, the leaves in these two subtrees are matched by the matching that forms the original tanglegram).at n=31A349409
- Number of polycubes avoiding corner connections.at n=9A363207