Properties of the Number 78405

Seventy-Eight Thousand Four Hundred Five

Basics

Value: 78404 → 78405 → 78406

Parity: odd

Prime: No

Previous Prime: 78401

Next Prime: 78427

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 5227

Divisors: 1, 3, 5, 15, 5227, 15681, 26135, 78405

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011001001000101

Octal: 231105

Duodecimal: 39459

Hexadecimal: 13245

Square: 6147344025

Square Root: 280.00892842907706

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

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1,0,1), (1,-1,1), (1,0,0), (1,1,-1), (1,1,1)}. A150888

a(n) = 2ⁿ + binomial(n, floor(n/2)) - 1. A261681

Smallest positive integer than cannot be obtained from exactly n copies of n using parentheses and the operations +, -, /, *, ^ and concatenation. A78405