7852
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 14896
- Proper Divisor Sum (Aliquot Sum)
- 7044
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3600
- Möbius Function
- 0
- Radical
- 3926
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 83
- 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 Costas arrays of order n, counting rotations and flips as distinct.at n=11A008404
- Numbers k such that the continued fraction for sqrt(k) has period 56.at n=38A020395
- a(n+1) = a(n) + a(n-1) + Fibonacci(n), with a(0) = 0 and a(1) = 1.at n=16A029907
- Numbers k such that 145*2^k+1 is prime.at n=16A032422
- Numbers k whose decimal representation, read as a base-22 value and divided by k, yields an integer.at n=18A032575
- Smallest composite that when added to sum of prime factors reaches a prime after n iterations.at n=32A050710
- Numbers n such that n | sigma_10(n).at n=43A055714
- Numbers n such that n and its reversal are both multiples of 13.at n=37A062903
- Non-palindromic number and its reversal are both multiples of 13.at n=23A062912
- Product of n-th prime number and n-th composite number.at n=35A067563
- Numbers k such that sigma(reverse(k)) = sigma(reverse(k-1)) + sigma(reverse(k-2)).at n=12A069970
- Number of ways that a directed line (or river) that starts in the south can cross an east-west road n times.at n=12A077014
- a(n) = 4*3^n/3 - 5*0^n/6 - (n-1)2^(n-1).at n=8A083587
- Triangle read by rows: T(n,k) is the number of k-matchings in the P_4 X P_n lattice graph.at n=47A100265
- Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.at n=19A112861
- Numbers k such that k and k^2 together contain all ten digits.at n=21A122477
- Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 6.at n=25A154056
- Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 6.at n=22A154056
- Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 6.at n=19A154056
- Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 6.at n=13A154056