1428
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 4032
- Proper Divisor Sum (Aliquot Sum)
- 2604
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 384
- Möbius Function
- 0
- Radical
- 714
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 34
- 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
- Symmetrical dissections of an n-gon.at n=13A000063
- Fermat coefficients.at n=6A000971
- Number of 2n-step self-avoiding walks on diamond lattice ending at point with x = 0.at n=4A001396
- a(n) = binomial(3*n,n)/(2*n+1) (enumerates ternary trees and also noncrossing trees).at n=6A001764
- Numbers k such that 45*2^k - 1 is prime.at n=37A002242
- Numbers k such that the k-th tetrahedral number is the sum of 2 tetrahedral numbers.at n=37A002311
- Discriminants of the known imaginary quadratic fields with 1 class per genus (a finite sequence).at n=57A003644
- a(n) = n*(5*n - 1)/2.at n=24A005476
- Quadrinomial coefficients.at n=6A005720
- a(n) = a(n-1) + a(n - 1 - number of even terms so far).at n=27A006336
- a(n) = Sum_{k=1..n-1} k XOR n-k.at n=44A006582
- Coordination sequence T2 for Zeolite Code CAS.at n=23A008064
- Coordination sequence T7 for Zeolite Code MTT.at n=23A008195
- Coordination sequence T2 for Zeolite Code NES.at n=24A008206
- Coordination sequence T2 for Zeolite Code NON.at n=23A008213
- Number of irreducible alternating Euler sums of depth 6 and weight 6+2n.at n=12A011796
- a(n) = floor(binomial(n,5)/6).at n=18A011843
- a(n) = floor(n*(n-1)*(n-2)/30).at n=36A011912
- From table of maximal epacts e(p) and corresponding primes p, for x_1=2, x_{m+1} = (x_m)^2+1; sequence gives e(p).at n=43A014423
- Average of twin prime pairs.at n=46A014574