1355
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1632
- Proper Divisor Sum (Aliquot Sum)
- 277
- 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
- 1080
- Möbius Function
- 1
- Radical
- 1355
- 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
- 114
- 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 nonnegative solutions to x^2 + y^2 + z^2 <= n^2.at n=13A000604
- From a definite integral.at n=7A002571
- 1 + (sum of first n odd primes - n)/2.at n=37A005521
- Coordination sequence T1 for Zeolite Code BPH.at n=28A008055
- Coordination sequence T2 for Zeolite Code GOO.at n=25A008112
- Coordination sequence T2 for Zeolite Code STI.at n=25A008235
- Crystal ball sequence for planar net 3.6.3.6.at n=24A008580
- Coordination sequence T3 for Zeolite Code iRON.at n=26A009883
- a(n) = floor( Gamma(n+1/3) ).at n=7A014511
- Nearest integer to Gamma(n + 1/3).at n=7A014516
- Number of 5-tuples of different integers from [ 1,n ] with no common factors among triples.at n=14A015646
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T5 atom.at n=10A019173
- a(n) = n*(27*n + 1)/2.at n=10A022285
- Numbers k such that Fibonacci(k) == 5 (mod k).at n=44A023176
- Index of 4^n within the sequence of the numbers of the form 4^i*5^j.at n=55A025702
- Index of 6^n within the sequence of the numbers of the form 6^i*8^j.at n=55A025717
- a(n) = Sum_{i=0..n} Sum_{j=0..n} A026637(i,j).at n=9A026646
- Sequence satisfies T(a)=a, where T is defined below.at n=35A027592
- Numbers k such that k^2 + k + 1 is a palindrome.at n=12A028413
- Number of partitions of n^2 into distinct squares.at n=32A030273