Properties of the Number 78421

Seventy-Eight Thousand Four Hundred Twenty-One

Basics

Value: 78420 → 78421 → 78422

Parity: odd

Prime: No

Previous Prime: 78401

Next Prime: 78427

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 × 17 × 659

Divisors: 1, 7, 17, 119, 659, 4613, 11203, 78421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011001001010101

Octal: 231125

Duodecimal: 39471

Hexadecimal: 13255

Square: 6149853241

Square Root: 280.03749748917556

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

Numbers n which are divisors of the number produced by concatenating (n-1), (n-2), ... (n-10) in that order. A88871

Number of -n..n arrays x(0..4) of 5 elements with zero sum and no element more than one greater than the previous. A199849

Least positive integer solution k to h(k) = n h(k-1), where h(n) is the length of n, f(n), f(f(n)), ...., 1 in the Collatz (or 3x + 1) problem. (The earliest "1" is meant.) A78421