1061
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
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 1062
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1060
- Möbius Function
- -1
- Radical
- 1061
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 124
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 178
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Irregular primes: primes p such that at least one of the numerators of the Bernoulli numbers B_2, B_4, ..., B_{p-3} (A000367) is divisible by p.at n=64A000928
- Lesser of twin primes.at n=38A001359
- Squares written in base 9.at n=27A002442
- Numbers that are the sum of 7 positive 5th powers.at n=30A003352
- Expansion of (1 + x - x^5) / (1 - x)^3.at n=41A004120
- Divisible only by primes congruent to 4 mod 7.at n=32A004622
- First differences of A005579.at n=17A005347
- Positions of remoteness 5 in Beans-Don't-Talk.at n=29A005697
- Numbers k such that (19^k - 1)/18 is prime.at n=7A006035
- From relations between Siegel theta series.at n=7A006476
- Primes p such that 2^p - 1 has at most 2 prime factors.at n=51A006514
- Emirps (primes whose reversal is a different prime).at n=40A006567
- Number of primes with n digits.at n=4A006879
- Primes of the form 8k + 5.at n=45A007521
- Coordination sequence T2 for Zeolite Code BPH.at n=25A008056
- Coordination sequence T3 for Zeolite Code MOR.at n=21A008184
- Coordination sequence T5 for Zeolite Code NES.at n=21A008209
- Least m such that if a/b < c/d are Farey fractions of order n then there exists k such that a/b < k/m < c/d, k/m reduced.at n=37A009571
- Coordination sequence T1 for Zeolite Code AHT.at n=22A009866
- Coordination sequence T6 for Zeolite Code VNI.at n=20A009912