1047
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
- 1400
- Proper Divisor Sum (Aliquot Sum)
- 353
- 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
- 696
- Möbius Function
- 1
- Radical
- 1047
- 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
- 124
- 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
- 1 + (sum of first n odd primes - n)/2.at n=33A005521
- Poincaré series [or Poincare series] of Lie algebra associated with a certain braid group.at n=8A007990
- Coordination sequence T2 for Zeolite Code AWW.at n=23A008046
- Coordination sequence T1 for Zeolite Code DOH.at n=20A008078
- Coordination sequence T1 for Zeolite Code FAU.at n=27A008105
- Coordination sequence T2 for Zeolite Code HEU.at n=21A008117
- Coordination sequence T4 for Zeolite Code MOR.at n=21A008185
- Coordination sequence T5 for Zeolite Code VNI.at n=20A009911
- Partition function coefficients for square lattice spin 1 Ising model.at n=18A010107
- Number of 5-tuples of different integers from [ 2,n ] with no common factors among quadruples.at n=12A015645
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MAZ = Mazzite (Na2,K2,Ca,Mg)5[Al10Si26O72].28H2O starting from a T2 atom.at n=10A019143
- Sum of digits in n-th term of A022470.at n=21A022475
- Convolution of natural numbers >= 3 and (Fib(2), Fib(3), Fib(4), ...).at n=9A023554
- Convolution of Lucas numbers and (1, p(1), p(2), ...).at n=9A023617
- Coordination sequence T4 for Zeolite Code MWW.at n=22A024989
- a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026659.at n=10A026667
- [ exp(3/8)*n! ].at n=5A030960
- 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 20.at n=18A031518
- Numbers with exactly four distinct base-10 digits.at n=18A031969
- Numbers k such that 149*2^k+1 is prime.at n=18A032424