1477
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1696
- Proper Divisor Sum (Aliquot Sum)
- 219
- 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
- 1260
- Möbius Function
- 1
- Radical
- 1477
- 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
- 21
- 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
- Coefficients of ménage hit polynomials.at n=6A000033
- a(n) = floor(3^n / 2^n).at n=18A002379
- Numbers of the form (p^2 - 1)/120 where p is 1 or prime.at n=38A002381
- Expansion of 1 / ((1-x)^2*(1-x^2)*(1-x^3)*(1-x^4)).at n=25A002621
- Numbers k such that k! + 1 is prime.at n=17A002981
- Numerators of coefficients of Green function for cubic lattice.at n=3A003281
- a(n) = 1000*log_10(n) rounded down.at n=29A004225
- a(n) = 1000*log_10(n) rounded to the nearest integer.at n=29A004226
- Odd numbers not of form p + 2^k (de Polignac numbers).at n=26A006285
- If a, b are in the sequence, so is ab+3.at n=36A009302
- Coordination sequence T2 for Zeolite Code CON.at n=27A009869
- a(n) = floor( n*(n-1)*(n-2)/29 ).at n=36A011911
- [ sqrt(3/2)^n ].at n=36A014215
- Positive integers n such that 2^n == 2^7 (mod n).at n=43A015927
- Powers of fourth root of 7 rounded up.at n=15A018065
- Pseudoprimes to base 15.at n=4A020143
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=6A020381
- a(n) = n*(15*n + 1)/2.at n=14A022273
- Partial sums of the sequence of prime powers (A000961).at n=36A024918
- a(n) = Sum_{k=1..n} k*[ (n/k)*[ (n/k)*[ n/k ] ] ].at n=9A024933