4825
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 6014
- Proper Divisor Sum (Aliquot Sum)
- 1189
- 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
- 3840
- Möbius Function
- 0
- Radical
- 965
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 59
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 2 nonzero 6th powers.at n=8A003358
- Numbers that are the sum of at most 2 nonzero 6th powers.at n=13A004853
- Numbers that are the sum of at most 3 nonzero 6th powers.at n=26A004854
- Numbers that are the sum of at most 4 nonzero 6th powers.at n=45A004855
- Pseudoprimes to base 7.at n=13A005938
- 6-dimensional centered cube numbers.at n=3A008516
- Numbers k such that the continued fraction for sqrt(k) has period 9.at n=27A010339
- Pseudoprimes to base 43.at n=45A020171
- Numbers k that divide the (right) concatenation of all numbers <= k written in base 11 (most significant digit on left).at n=27A029456
- Nonsquarefree k such that Pell equation x^2 - k*y^2 = -1 is soluble.at n=38A031397
- Numbers k such that 69*2^k+1 is prime.at n=18A032384
- Numbers whose set of base-8 digits is {1,3}.at n=36A032915
- Number of partitions of n with equal number of parts congruent to each of 3 and 4 (mod 5).at n=37A035561
- Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^20 in powers of x.at n=4A047645
- a(n)=T(n,3), array T as in A049735.at n=39A049746
- Number of ordered factorizations of n with 3 levels of parentheses.at n=71A050358
- Number of ordered factorizations with 3 levels of parentheses indexed by prime signatures: A050358(A025487(n)).at n=14A050359
- Odd numbers seen in decimal expansion of Pi (disregarding the decimal period) contiguous, smallest and distinct.at n=27A050817
- 18-gonal (or octadecagonal) numbers: a(n) = n*(8*n-7).at n=25A051870
- Numbers k such that 285*2^k + 1 is prime.at n=24A053359