1048
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1980
- Proper Divisor Sum (Aliquot Sum)
- 932
- 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
- 520
- Möbius Function
- 0
- Radical
- 262
- Omega Function (Ω)
- 4
- 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
- 31
- 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
- Numbers k such that 3^k, 3^(k+1) and 3^(k+2) have the same number of digits.at n=48A001682
- Nonperiodic autocorrelation functions of length n.at n=11A006606
- McKay-Thompson series of class 6E for Monster (and, apart from signs, of class 12B).at n=27A007258
- Coordination sequence T2 for Zeolite Code LAU.at n=23A008125
- Coordination sequence T1 for Zeolite Code LEV.at n=24A008127
- Coordination sequence T5 for Zeolite Code MFS.at n=20A008177
- Coordination sequence T4 for Zeolite Code STI.at n=22A008237
- Powers of fourth root of 22 rounded down.at n=9A018108
- Powers of fourth root of 22 rounded to nearest integer.at n=9A018109
- Numbers k such that the continued fraction for sqrt(k) has period 18.at n=27A020357
- Place where n-th 1 occurs in A007337.at n=34A022777
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = A000201 (lower Wythoff sequence).at n=15A025118
- Number of partitions of n with distinct parts p(i) such that if i != j, then |p(i) - p(j)| >= 4.at n=65A025158
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 2, 0, 1, 2.at n=10A025247
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4.at n=10A025265
- a(n) = (1/2) * A027170(2n, n).at n=4A027172
- a(n) = (1/2)*(n-th largest even number in array T given by A027170).at n=35A027184
- a(n) = least k such that 1+2+...+k >= 1^3 + 2^3 + ... + n^3.at n=37A027924
- Numbers having period-3 7-digitized sequences.at n=23A031203
- Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 7.at n=16A031410