Properties of the Number 43641

Forty-Three Thousand Six Hundred Forty-One

Basics

Value: 43640 → 43641 → 43642

Parity: odd

Prime: No

Previous Prime: 43633

Next Prime: 43649

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 13 × 373

Divisors: 1, 3, 9, 13, 39, 117, 373, 1119, 3357, 4849

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010101001111001

Octal: 125171

Duodecimal: 21309

Hexadecimal: aa79

Square: 1904536881

Square Root: 208.90428430264421

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms 0, 1, 1, 0. A317975

Antidiagonal sums of the array A028412. A214983

Number of aperiodic necklaces (Lyndon words) with k<=5 black beads and n-k white beads. A277629

Numbers k such that 139·2^k-1 is prime. A50595

Least odd number d such that the Collatz iteration of d has the following property: if the length of the iteration is b and the maximum value occurs at c, the ratio c/b is the n-th Farey-like fraction. A224537

Numbers whose base-10 representation has exactly 5 runs. A43641