3126
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6264
- Proper Divisor Sum (Aliquot Sum)
- 3138
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1040
- Möbius Function
- -1
- Radical
- 3126
- Omega Function (Ω)
- 3
- 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
- 154
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- yes
- Odd
- no
Appears in sequences
- sigma_5(n), the sum of the 5th powers of the divisors of n.at n=4A001160
- a(n) = n^5 + 1.at n=6A002561
- Numbers that are the sum of 2 positive 5th powers.at n=10A003347
- Numbers that are the sum of at most 2 positive 5th powers.at n=16A004842
- Numbers that are the sum of at most 3 positive 5th powers.at n=36A004843
- a(n) = floor(n*phi^13), where phi is the golden ratio, A001622.at n=6A004928
- a(n) = round(n*phi^13), where phi is the golden ratio, A001622.at n=6A004948
- Number of graphs on n nodes with 3 cliques.at n=14A005289
- Number of Twopins positions.at n=19A005690
- Difference between two partition g.f.s.at n=11A007327
- Coordination sequence T4 for Zeolite Code GOO.at n=38A008114
- Coordination sequence T1 for Zeolite Code ATO.at n=37A008265
- Sierpiński numbers of the first kind: n^n + 1.at n=5A014566
- Numbers k such that k | 5^k + 5.at n=9A015891
- Numerator of sum of -5th powers of divisors of n.at n=4A017673
- Pseudoprimes to base 25.at n=36A020153
- a(n)-th prime is sum of first k primes for some k.at n=11A020641
- Positive numbers k such that k = x^5 + y^5 has a solution in nonzero integers x, y.at n=20A020896
- Numbers k such that Fibonacci(k) == 8 (mod k).at n=27A023177
- a(n) = prime(n)*prime(n-1) - 1.at n=16A023515