1339
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1456
- Proper Divisor Sum (Aliquot Sum)
- 117
- 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
- 1224
- Möbius Function
- 1
- Radical
- 1339
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 26
- 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
- Number of cells of square lattice of edge 1/n inside quadrant of unit circle centered at 0.at n=41A001182
- Numbers that are the sum of 2 positive cubes.at n=51A003325
- Sum of cubes of primes dividing n.at n=21A005064
- Sum of cubes of primes dividing n.at n=43A005064
- Sum of cubes of primes = 2 mod 3 dividing n.at n=43A005076
- Sum of cubes of primes = 2 mod 3 dividing n.at n=65A005076
- Sum of cubes of primes = 2 mod 3 dividing n.at n=21A005076
- Sequence and first differences (A030124) together list all positive numbers exactly once.at n=46A005228
- Number of lattice points inside circle of radius n is 4(a(n)+n)-3.at n=41A007882
- a(n) = n OR n^3 (applied to binary expansions).at n=10A008468
- Six iterations of Reverse and Add are needed to reach a palindrome.at n=21A015984
- a(n) is the concatenation of n and 3n.at n=12A019551
- Pseudoprimes to base 56.at n=17A020184
- a(1) = 2; a(n+1) = a(n)-th composite.at n=19A022450
- a(n) = a(n-1) + c(n+1) for n >= 3, a( ) increasing, given a(1)=1, a(2)=7; where c( ) is complement of a( ).at n=45A022953
- Numbers that are sums of 2 distinct positive cubes.at n=43A024670
- Index of 9^n within the sequence of the numbers of the form 9^i*10^j.at n=52A025739
- Coordination sequence T3 for Zeolite Code ITE.at n=25A027371
- a(n) = n^2 + n + 7.at n=36A027692
- Lucky numbers with size of gaps equal to 10 (upper terms).at n=16A031893