3185
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4788
- Proper Divisor Sum (Aliquot Sum)
- 1603
- 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
- 2016
- Möbius Function
- 0
- Radical
- 455
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 30
- 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
- no
- Odd
- yes
Appears in sequences
- 4-dimensional pyramidal numbers: a(n) = n^2*(n^2-1)/12.at n=14A002415
- a(n) = ceiling(n*phi^11), where phi is the golden ratio, A001622.at n=16A004966
- Sum of next n primes.at n=10A007468
- Coordination sequence T1 for Zeolite Code MAZ.at n=39A008144
- Coordination sequence T5 for Zeolite Code MEL.at n=36A008154
- Positive integers k such that k-th triangular number is palindromic.at n=18A008509
- Number of commutative elements in Coxeter group H_n.at n=6A013981
- Pseudoprimes to base 99.at n=33A020227
- Numbers whose base-2 representation is the juxtaposition of two identical strings.at n=48A020330
- a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t(n)=2*n+1 (odd numbers).at n=25A023865
- Integer part of ((4th elementary symmetric function of 1,2,..,n)/(2nd elementary symmetric function of 1,2,...,n)).at n=19A024173
- a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n-k+1), where k = floor(n/2), s = natural numbers, t = odd natural numbers.at n=24A024862
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=22A025405
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=24A025407
- Numbers that are the sum of 4 distinct positive cubes in exactly 3 ways.at n=5A025410
- Numbers that are the sum of 4 distinct positive cubes in 3 or more ways.at n=5A025413
- Expansion of 1/((1-2x)(1-5x)(1-6x)(1-8x)).at n=3A025987
- a(n) = (d(n)-r(n))/2, where d = A026043 and r is the periodic sequence with fundamental period (1,1,0,0).at n=23A026044
- Distinct odd numbers in the (1,2)-Pascal triangle A029635.at n=51A029642
- Numbers to the right of the central elements of the (1,2)-Pascal triangle A029635 that are different from 2.at n=52A029649