12528
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 40
- Divisor Sum
- 37200
- Proper Divisor Sum (Aliquot Sum)
- 24672
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4032
- Möbius Function
- 0
- Radical
- 174
- Omega Function (Ω)
- 8
- 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
- no
- Harshad Number
- yes
- Narcissistic Number
- no
- Collatz Steps
- 125
- 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
- Numbers k such that the decimal part of k^(1/10) starts with a 'nine digits' anagram.at n=6A034285
- Numbers whose base-4 representation contains exactly four 0's and three 3's.at n=5A045084
- A sequence related to Ramanujan's tau function.at n=23A055978
- Numbers k such that sigma (x) = k has exactly 11 solutions.at n=14A060678
- a(n) = 3*(n - 2)*(5*n -11).at n=29A060785
- 30 'Reverse and Add' steps are needed to reach a palindrome.at n=2A065319
- a(n)=phi(n^2+1)/n if (n^2+1) is composite and phi(n^2+1)==0 (mod n).at n=27A067926
- Numbers k such that gcd(d(k^3), d(k)) is not a power of 2.at n=36A069781
- a(n) = 16*(8*prime(n) + 7).at n=24A098823
- a(n) = round(10000*log(n/10)).at n=34A104077
- a(n) = 16*n*(n+2).at n=27A114444
- Primitive elements of A096490.at n=12A118671
- Floor((n*(n+1)^3/8)^n)-(n!)^4.at n=3A127425
- Numbers n such that 1 - Sum_{k=1..n-1} A001223(k)*(-1)^k = 0.at n=36A128039
- Numbers n such that primorial(n)/2 - 128 is prime.at n=16A139450
- 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, 1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.at n=7A150815
- Number of hv-convex sets from class S having semiperimeter n of the bounding rectangle.at n=7A151828
- a(n) = 64*n^2 - 16.at n=13A157913
- a(n) = 49*n^2 - n.at n=15A157923
- a(n) = 196*n^2 - 2*n.at n=7A158224