1543
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 1544
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1542
- Möbius Function
- -1
- Radical
- 1543
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 109
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 243
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes that divide at least one term in every Fibonacci sequence.at n=49A000057
- Number of partitions into non-integral powers.at n=6A000347
- Primes with 5 as smallest primitive root.at n=34A001124
- Numbers that are the sum of 5 positive 5th powers.at n=31A003350
- Sum of 10 positive 9th powers.at n=3A003399
- G.f.: 1/((1-x)*(1-x^2)*(1-x^3)^2*(1-x^4)*(1-x^5)).at n=28A003402
- Numbers that are the sum of at most 10 positive 9th powers.at n=37A004894
- Numbers that are the sum of at most 11 positive 9th powers.at n=40A004895
- Class 4+ primes (for definition see A005105).at n=24A005108
- Number of unlabeled trivalent 3-connected bipartite planar graphs with 2n nodes.at n=14A007083
- Number of lattice points inside circle of radius n is 4(a(n)+n)-3.at n=44A007882
- Primes p==1 (mod 6) such that 3 and -3 are both cubes (one implies other) modulo p.at n=35A014753
- Numbers k such that the continued fraction for sqrt(k) has period 52.at n=2A020391
- Primes p such that 4*p+1 is also prime.at n=43A023212
- Primes p such that 5*p + 8 is also prime.at n=51A023220
- Primes that remain prime through 2 iterations of function f(x) = 8x + 3.at n=25A023261
- Convolution of odd numbers and A000201.at n=13A023658
- Coordination sequence T5 for Zeolite Code MWW.at n=26A024990
- [ Sum (s(j) - s(i))^2 ], 1 <= i < j <= n, where s(k) = 1 + 1/2 + ... + 1/k.at n=46A025216
- Primes that are palindromic in base 13.at n=26A029980