5048
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
- 8
- Divisor Sum
- 9480
- Proper Divisor Sum (Aliquot Sum)
- 4432
- 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
- 2520
- Möbius Function
- 0
- Radical
- 1262
- Omega Function (Ω)
- 4
- 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
- 41
- 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
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=29A005897
- Coordination sequence T3 for Zeolite Code LOV.at n=47A008136
- Coordination sequence T2 for Zeolite Code RSN.at n=46A009886
- Coordination sequence for NiAs(1), As position.at n=29A009943
- Numbers k such that Fib(k) == 21 (mod k).at n=34A023179
- Numbers with exactly 6 2's in their ternary expansion.at n=32A023704
- Number of positive integers that are not the sum of distinct n-th-order polygonal numbers.at n=36A025524
- Number of unlabeled strongly connected digraphs with n nodes.at n=5A035512
- Number of partitions of n into parts not of the form 19k, 19k+9 or 19k-9. Also number of partitions with at most 8 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=31A035978
- Numbers ending with '8' that are the difference of two positive cubes.at n=21A038863
- Numbers whose base-3 representation contains exactly two 0's and no 1's.at n=37A044975
- Number of basis partitions of n+36 with Durfee square size 6.at n=22A053801
- Number of unlabeled semi-strong digraphs on n nodes with an odd number of pairwise different components.at n=4A054953
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 97 ).at n=13A063370
- Numbers n such that sigma(n+2) - sigma(n) = prime(n+2) - prime(n).at n=9A067058
- Smallest k > n such that F(n) + F(i) divides F(k) + F(i) 1<=i<=n and where F(n) are the Fibonacci numbers.at n=7A071779
- a(n) = Min_{k | A071891(k) = n}.at n=6A071893
- Difference between the sum of next prime(n) natural numbers and the sum of next n primes.at n=14A082749
- Triangle, read by rows, where the n-th row is the first n terms of the n-th self-convolution of the sequence formed by flattening this triangle.at n=34A086606
- Ratio A095109(n)/A095091(n) rounded down.at n=19A095359