5054
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 9144
- Proper Divisor Sum (Aliquot Sum)
- 4090
- 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
- 2052
- Möbius Function
- 0
- Radical
- 266
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 178
- 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
- Coordination sequence T1 for Coesite.at n=38A008267
- n written in fractional base 10/5.at n=54A024660
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 20 (most significant digit on right).at n=15A029513
- Numbers k such that 169*2^k+1 is prime.at n=15A032461
- Floor( 7*n^2/2 ).at n=38A032525
- Iterated procedure 'composite k added to sum of its prime factors reaches a prime' yields 5 skipped primes.at n=41A050772
- Numbers whose 5th power is expressible as the sum of two positive cubes.at n=48A051394
- Numbers k such that k | 12^k + 11^k + 1.at n=25A057293
- Numbers k such that (5*3^k - 7)/2 is prime.at n=16A059622
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 92 ).at n=33A063365
- Numbers n such that sum of digits of n equals the squarefree part of n.at n=36A070274
- If D[n] is divisor-set of n, then in set of 1+D only 2 primes occur:{2,3}; also n is not squarefree.at n=17A072607
- Left side of the triangle A075652.at n=50A075648
- G.f.: 1/((1-x)^2*(1-x^2)*(1-x^4)*(1-x^8)).at n=45A088932
- Least multiple of n == 1 (mod prime(n)).at n=37A090938
- "Orders" where balanced prime number records (A082080) occur.at n=43A096692
- a(n) = ceiling(Sum_{i=1..n-1} a(i)/4) for n >= 2 starting with a(1) = 1.at n=41A120160
- Exponentiation of A132841.at n=24A132842
- Number of errors that occur when choosing n as modulus in French INSEE code (0<n<100).at n=79A137385
- Numbers with at least two digits in which all digits except the rightmost are 0 or 5 and the rightmost is neither 0 nor 5.at n=35A144162