11761
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12400
- Proper Divisor Sum (Aliquot Sum)
- 639
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 11124
- Möbius Function
- 1
- Radical
- 11761
- 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
- 50
- 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
- a(n) = 10000*log_10(n) rounded to the nearest integer.at n=14A004229
- a(n) = 10000*log_10(n) rounded up.at n=14A004230
- Size of lexicographic code of length n, Hamming distance 6 and weight 6.at n=47A031504
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 70 ones.at n=13A031838
- Erroneous version of A057752.at n=9A045916
- Smallest value of x such that M(x) = n, where M() is Mertens's function A002321.at n=36A051400
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 11.at n=40A064909
- Number of connected ordered 5-element multiantichains on a labeled n-set.at n=4A094732
- Triangle read by rows: even-numbered rows of A106580.at n=61A106585
- Least semiprime s for which the Mertens function M(s) = n.at n=40A123173
- a(n) = 7*n^2 + 14*n + 1.at n=40A131878
- 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), (0, 1, -1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.at n=8A149582
- 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), (-1, 0, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.at n=7A150783
- a(n) = 392*n + 1.at n=30A158002
- a(n) = 60*n^2 + 1.at n=14A158673
- Number of binary strings of length n with equal numbers of 00010 and 00100 substrings.at n=14A164211
- n^3+Smallest square, (Smallest square >= n^3).at n=18A176581
- Number of 5-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero.at n=9A208826
- Expansion of e.g.f. 1/(1 - sin(6*x))^(1/6).at n=5A227544
- Numbers k that divide 2^k + 5.at n=4A245318