1494
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 3276
- Proper Divisor Sum (Aliquot Sum)
- 1782
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 492
- Möbius Function
- 0
- Radical
- 498
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 47
- 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
- First occurrence of n consecutive numbers that take same number of steps to reach 1 in 3x+1 problem.at n=7A000546
- Numbers k such that 9*2^k + 1 is prime.at n=24A002256
- Number of basic invariants for cyclic group of order and degree n.at n=14A002956
- Numerators of continued fraction convergents to cube root of 7.at n=5A005484
- Numbers n such that n! has a square number of digits.at n=30A006488
- Optimal cost of search tree for searching an ordered array of n elements with cost k of probing element k.at n=26A007077
- Shifts left when inverse Moebius transform applied twice.at n=27A007557
- Coordination sequence T2 for Zeolite Code BIK.at n=24A008048
- Coordination sequence T3 for Zeolite Code MOR.at n=25A008184
- Coordination sequence T3 for Zeolite Code SGT.at n=24A008231
- Coordination sequence T1 for Zeolite Code TON.at n=24A008241
- Let j = | i - i_written_backwards |, k = j + j_written_backwards; then k is in this sequence.at n=18A008920
- "Pascal sweep" for k=7: draw a horizontal line through the 1 at C(k,0) in Pascal's triangle; rotate this line and record the sum of the numbers on it (excluding the initial 1).at n=44A009504
- Coordination sequence for sigma-CrFe, Position Xb.at n=10A009960
- Number of triples of different integers from [ 2,n ] with no global factor.at n=22A015618
- Number of triples of different integers from [ 2,n ] with no common factors between pairs.at n=31A015620
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MOR = Mordenite Na8[Al8Si40O96].24H2O starting with a T3 atom.at n=10A019181
- Position of n^3 + (n+1)^3 in A003325.at n=45A024669
- Index of 6^n within the sequence of the numbers of the form 3^i*6^j.at n=42A025713
- Index of 10^n within the sequence of the numbers of the form 3^i*10^j.at n=37A025741