4805
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5958
- Proper Divisor Sum (Aliquot Sum)
- 1153
- 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
- 3720
- Möbius Function
- 0
- Radical
- 155
- 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
- no
- 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
- Number of sublattices of index n in generic 3-dimensional lattice.at n=39A001001
- Greatest k such that binomial(k,n) has fewer than n distinct prime factors.at n=24A005735
- a(n) = floor( n*(n-1)*(n-2)/26 ).at n=51A011908
- Numbers k giving rise to prime quadruples (30k+11, 30k+13, 30k+17, 30k+19).at n=43A014561
- a(n) = self-convolution of row n of array T given by A026780.at n=6A027247
- a(n) = 5*n^2.at n=31A033429
- Numerators of continued fraction convergents to sqrt(601).at n=5A042152
- Numbers whose base-7 representation contains exactly three 0's.at n=32A043395
- Numbers k that divide 7^k + 3^k.at n=19A045586
- Numbers k such that k and k-1 both have 6 divisors.at n=46A049104
- Numbers n such that n | 11^n + 10^n + 9^n + 8^n + 7^n.at n=35A057251
- a(n) is the least nonnegative integer k such that 2^n - k is a safe prime.at n=51A057821
- Triangle read by rows: T(n,k) is the number of labeled commutative semigroups of order n with k idempotents.at n=10A058167
- Integer part of log(n!)^(1 + log(1 + log(n))).at n=18A062443
- Nearest integer to log(n!)^(1 + log(1 + log(n))).at n=18A062444
- Numbers k such that sigma(core(k)) = tau(k) where core(k) is the squarefree part of k, tau(k) is the number of divisors of k, and sigma(k) is their sum.at n=33A069827
- Numbers k such that the k-th cyclotomic polynomial evaluated at 2 (=A019320(k)) is not coprime to k.at n=42A093106
- Numbers n such that the Zsigmondy number Zs(n,4,1) differs from the n-th cyclotomic polynomial evaluated at 4.at n=47A093108
- Numbers with ordered prime signature (1,2).at n=41A095990
- Integer part of n#/((p-7)# 7#), where p=preceding prime to n.at n=26A102788