11278
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 16920
- Proper Divisor Sum (Aliquot Sum)
- 5642
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5638
- Möbius Function
- 1
- Radical
- 11278
- 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
- 86
- 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
- yes
- Odd
- no
Appears in sequences
- Weighted count of partitions with distinct parts.at n=35A005895
- Expansion of phi(x) / f(-x) in powers of x where phi(), f() are Ramanujan theta functions.at n=27A029552
- Numerators of continued fraction convergents to sqrt(976).at n=6A042888
- McKay-Thompson series of class 20E for Monster.at n=21A058554
- Consecutive terms of A065966 which are also consecutive integers.at n=26A065976
- In base 2: n sets a new record for the number of 'Reverse and Add' steps needed to reach a palindrome starting with n.at n=12A066144
- Numbers which retain their position in A073666 (position not disturbed by the rearrangement).at n=43A073667
- Numbers n such that 9*2^(2*n-1) - 1 is prime.at n=29A091996
- Greatest number having exactly n representations as ab+ac+bc with 1 <= a <= b <= c.at n=13A094380
- Indices of primes in sequence defined by A(0) = 43, A(n) = 10*A(n-1) + 33 for n > 0.at n=25A101730
- Dimension of the space of totally primitive elements of degree n in the Hopf algebra of parking functions, regarded as a bidendriform algebra.at n=5A122705
- Number of bits in A127962(n).at n=26A127965
- Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,2 5,3 polyhexes in any orientation on a planar n X n X n triangular grid.at n=7A155336
- a(n) = A306912(n) - 2.at n=25A209489
- Numbers k such that A084937(3k) > A084937(3k+1).at n=28A249689
- Expansion of Product_{k>=1} 1/(1 - (k - 1)*x^k).at n=20A319110
- Numbers k with the property that the product of the digits of k starts k.at n=58A352463
- Consecutive states of the linear congruential pseudo-random number generator 172*s mod 30307 when started at s=1.at n=38A385032
- a(n) is the number of free polyominoids that have faces aligned to precisely 2 planes.at n=6A385399
- One third the number of solid partitions of n with 6 parts.at n=16A389773