11142
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 24180
- Proper Divisor Sum (Aliquot Sum)
- 13038
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3708
- Möbius Function
- 0
- Radical
- 3714
- Omega Function (Ω)
- 4
- 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
- yes
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 68
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Powers of fourth root of 12 rounded up.at n=15A018080
- Numbers which are the sum of their proper divisors containing the digit 7.at n=10A059466
- Numbers k such that sigma(k) = sigma(k+1)+sigma(k-1).at n=2A073500
- Positive integers n such that S(n) divides n, where S(n) is the sum of the iterates of the Euler phi-function of n, that is, S(n) = phi(n)+phi(phi(n))+....+ 1.at n=43A113808
- Antidiagonal sums of triangle A121775.at n=20A121776
- G.f. satisfies: A(x) = 1/(1-x) * A(x^2)*A(x^3)*A(x^4)*...*A(x^n)*...at n=25A129374
- Numbers k such that k and k^2 use only the digits 1, 2, 3, 4 and 6.at n=22A136969
- Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 6.at n=48A136988
- Numbers k such that k and k^2 use only the digits 1, 2, 4 and 6.at n=11A136992
- Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 7.at n=26A136993
- Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 8.at n=28A136994
- Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 9.at n=33A136995
- Expansion of phi(-q^3) / f(-q)^2 in powers of q where phi(), f() are Ramanujan theta functions.at n=21A137685
- a(n) = 81*n^2 - 44*n + 6.at n=12A156676
- Partial sums of A160414.at n=22A161325
- Lexicographically earliest increasing sequence which lists the positions of the zero digits in the sequence.at n=33A167519
- Numbers with digital product = 8.at n=37A199989
- Composite numbers whose product of digits is 8.at n=26A201056
- Number of parts in all partitions of n into even number of distinct parts.at n=51A238132
- Numbers x such that the base 10 representation of x^2 forms an arithmetic sequence when split into equal-sized chunks.at n=0A244660