7470
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 19656
- Proper Divisor Sum (Aliquot Sum)
- 12186
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1968
- Möbius Function
- 0
- Radical
- 2490
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 39
- 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
- Number of walks on cubic lattice.at n=29A005570
- Expansion of 1/((1-7*x)*(1-9*x)*(1-11*x)).at n=3A020971
- a(n) = A027082(n, n+2).at n=12A027083
- Numbers k such that A174141(k) is divisible by k.at n=34A032581
- Numbers congruent to 2,3,6,11 mod 12 missing from A042944 (conjectured to be finite).at n=33A042945
- Numbers n such that 291*2^n-1 is prime.at n=24A050904
- Triangle T(n,k) of numbers of minimal 4-covers of an unlabeled n+4-set that cover k points of that set uniquely (k=4,..,n+4).at n=48A057967
- Bisection of Lucas triangle A060922: even-indexed members of column sequences of A060922 (not counting leading zeros).at n=23A060923
- Second convolution of Lucas numbers A000032(n+1), n >= 0.at n=8A060929
- Third column of Lucas bisection triangle (even part).at n=4A061169
- Numbers k such that k+1 is composite and divides 3^k-2^k.at n=19A068410
- Numbers that are palindromic in base 2 as well as in base 10 (initial zeros may be prepended).at n=38A069024
- Least positive integer coefficients of power series A(x) such that the coefficients of A(x)^2 + A(x) - 1 consist entirely of squares.at n=68A083352
- Positions of 9 in partition of decimal expansion of Pi A104807.at n=24A104809
- Triangle of column sequences with a certain o.g.f. pattern.at n=52A112500
- Alternating sum of the cubes of the first n Fibonacci numbers.at n=8A119284
- a(n) = prime(n)*(prime(n+1) + 1).at n=22A123134
- Eighth column of triangle A035342.at n=2A132053
- Triangle of 4-Eulerian numbers.at n=23A144698
- G.f.: A(x) = exp( Sum_{n>=1} 3^(n^2)/(1 - 3^n*x)^n * x^n/n ).at n=3A156911