5403
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7208
- Proper Divisor Sum (Aliquot Sum)
- 1805
- 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
- 1
- Radical
- 5403
- Omega Function (Ω)
- 2
- 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
- 72
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- 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
- Denominators of convergents to cube root of 5.at n=10A002357
- Divisors of 2^50 - 1.at n=15A003554
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 48.at n=24A031546
- a(n) = 4*n^2 - 10*n + 7.at n=37A054554
- a(n) = p^2 + p + 1 where p runs through the primes.at n=20A060800
- Numbers that are sums of divisors of the odd squares; Intersection of A065764 and A065766, written in ascending order and duplicates removed.at n=33A065768
- Numbers n such that both n^4 + 2 and n^4 - 2 are prime.at n=26A071351
- Starting positions of strings of three 6's in the decimal expansion of Pi.at n=4A083625
- Numbers k such that p=k^2+2 and p+2 are primes.at n=51A086381
- Numbers of the form 1+(1+p)*p^e, p prime and e>0.at n=41A087195
- Number of hyperplanes in a finite projective space (of some dimension d over some finite field of order q).at n=57A090503
- a(n) = 3*(2*n^2 + 1).at n=30A097803
- Consider the family of directed multigraphs enriched by the species of involutions. Sequence gives number of those multigraphs with n labeled loops and arcs.at n=4A099698
- Numbers m such that (15m-4, 15m-2, 15m+2, 15m+4) is a prime quadruple.at n=32A112540
- Semiprimes s such that s-/+4 are primes.at n=33A125216
- Numbers k that divide 3^((k-1)/2) - 2^((k-1)/2) - 1.at n=40A130061
- The number of elements in S_4\det^{-1}(n)/GL(4,Z), where we take det : M_{4 X 4} (Z) => Z.at n=35A162159
- Number of binary strings of length n with equal numbers of 01001 and 01010 substrings.at n=13A164257
- Places n for which A001359(n) and A023200(n) is a twin prime pair.at n=42A174046
- Numbers of the form k^2+k+1 that are the product of two distinct primes.at n=33A176069