Properties of the Number 78507

Seventy-Eight Thousand Five Hundred Seven

Basics

Value: 78506 → 78507 → 78508

Parity: odd

Prime: No

Previous Prime: 78497

Next Prime: 78509

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 11 × 13 × 61

Divisors: 1, 3, 9, 11, 13, 33, 39, 61, 99, 117

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011001010101011

Octal: 231253

Duodecimal: 39523

Hexadecimal: 132ab

Square: 6163349049

Square Root: 280.1910062796449

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

Triangle T, read by rows, where column k of T = column 0 of matrix power T^k+1 for k>0, with column 0 of T = unsigned column 0 of T^-1 (shifted). A152400

Column 2 of triangle A152400. A152402

Numbers k that divide σ(k²) where σ is the sum of divisors function (A000203). A232354

Number of ascent sequences of length n with exactly eight flat steps. A242161

Numbers k satisfying gcd(k², σ(k²)) > σ(k), where σ is the sum-of-divisors function. A322154

a(n) = 2·n³ - 3·n + 1. A377663

Duplicate of A060199. A78507