Properties of the Number 64641

Sixty-Four Thousand Six Hundred Forty-One

Basics

Value: 64640 → 64641 → 64642

Parity: odd

Prime: No

Previous Prime: 64633

Next Prime: 64661

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 29 × 743

Divisors: 1, 3, 29, 87, 743, 2229, 21547, 64641

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010000001

Octal: 176201

Duodecimal: 314A9

Hexadecimal: fc81

Square: 4178458881

Square Root: 254.2459439204488

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

Consider the base-4 Kaprekar map n->K(n) defined in A165012. Sequence gives numbers belonging to cycles, including fixed points. A165017

List of fixed points of the base-4 Kaprekar map A165012. A165016

Smallest member of cycle corresponding to n-th term of A165029. A165030

Consider the base-4 Kaprekar map n->K(n) defined in A165012. Sequence gives least elements of each cycle, including fixed points. A165021

Fourth powers (n·n * n·n) in carryless arithmetic mod 10. A169886

Numerator of Hermite(n, 9/22). A159831

Unidirectional 'Delannoy' variation of the Boustrophedon transform applied to all 1's sequence: construct an array in which the first element of each row is 1 and subsequent entries are given by T(n,k) = T(n,k-1) + T(n-1,k-1) + T(n-1,k) + T(n-2,k-1). The last number in row n gives a(n). A64641