3212
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 6216
- Proper Divisor Sum (Aliquot Sum)
- 3004
- 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
- 1440
- Möbius Function
- 0
- Radical
- 1606
- 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
- 22
- 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
- Generalized class numbers c_(n,1).at n=32A000233
- Numbers that are the sum of 10 positive 7th powers.at n=19A003377
- Coordination sequence T1 for Zeolite Code LOV.at n=38A008134
- Coordination sequence T1 for Zeolite Code MTN.at n=34A008186
- Coordination sequence T5 for Zeolite Code MTT.at n=35A008193
- Coordination sequence T2 for Zeolite Code PHI.at n=41A008228
- Coordination sequence T6 for Zeolite Code CON.at n=40A009873
- n written in fractional base 4/3.at n=14A024631
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ] and s = (Fibonacci numbers).at n=13A025078
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (F(2), F(3), F(4), ...).at n=12A025082
- Number of sums S of distinct positive integers satisfying S <= n.at n=32A026906
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 28.at n=33A031526
- Numbers divisible by the sum of the cubes of their digits.at n=38A034088
- Number of partitions of n into parts 4k+2 and 4k+3 with at least one part of each type.at n=57A035626
- Number of partitions of n such that cn(3,5) < cn(0,5) = cn(1,5) < cn(2,5) = cn(4,5).at n=69A036877
- Coordination sequence T4 for Zeolite Code STF.at n=38A038439
- Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n-1.at n=36A044344
- Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n+1.at n=36A044725
- Number of increasing arithmetic progressions in {1,2,3,...,n}, including trivial arithmetic progressions of lengths 1 and 2.at n=42A051336
- Products of the three sides of Pythagorean triangles divided by 60.at n=39A057097