1774
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2664
- Proper Divisor Sum (Aliquot Sum)
- 890
- 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
- 886
- Möbius Function
- 1
- Radical
- 1774
- 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
- 55
- 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
- yes
- Odd
- no
Appears in sequences
- "Magic" integers: a(n+1) is the smallest integer m such that there is no overlap between the sets {m, m-a(i), m+a(i): 1 <= i <= n} and {a(i), a(i)-a(j), a(i)+a(j): 1 <= j < i <= n}.at n=26A004210
- a(n) = floor(tau*a(n-1)) + floor(tau*a(n-2)) with a(0)=1 and a(1)=3.at n=9A005913
- a(n) = n OR n^2 (applied to binary expansions).at n=41A007745
- Number of factors in the infinite word formed by the Kolakoski sequence A000002.at n=45A007782
- Coordination sequence T1 for Zeolite Code ABW and ATN.at n=29A008000
- Coordination sequence T1 for Zeolite Code DOH.at n=26A008078
- Coordination sequence T4 for Zeolite Code -CHI.at n=27A009849
- Expansion of 1/(1 - x^12 - x^13 - ...).at n=65A017906
- Numbers k such that the continued fraction for sqrt(k) has period 64.at n=2A020403
- Largest value of k for which Golay-Rudin-Shapiro sequence A020986(k) = n.at n=42A020991
- a(n) = a(n-1) + a(n-2) + 1 for n>1, a(0)=0, a(1)=1.at n=13A022311
- Numbers with exactly 3 4's in base 5 expansion.at n=36A023740
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = A001950 (upper Wythoff sequence).at n=47A024374
- Positions of squares among the powers of primes (A000961).at n=41A024626
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = A001950 (upper Wythoff sequence).at n=46A025074
- Numbers having period-6 5-digitized sequences.at n=14A031190
- 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 42.at n=1A031540
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=9A031792
- Number of partitions of n into parts 3k and 3k+2 with at least one part of each type.at n=42A035619
- Coordination sequence T9 for Zeolite Code STT.at n=28A038424