Properties of the Number -1721856

Seven Hundred Twenty-One Thousand Eight Hundred Fifty-Six

Basics

Value: -1721857 → -1721856 → -1721855

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ⁹ × 3 × 19 × 59

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 19, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -110100100011000000000

Octal: -6443000

Duodecimal: -6B0540

Hexadecimal: -1a4600

Square: 2964788084736

Square Root: 1312.1951074440112

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+1) = 4*(a(n)+a(n-1)) for n>1, a(1)=1, a(2)=6. A108051

Number of skew Dyck paths of semilength n having no DD's. A128739

Expansion of (1 + 6·x - 12·x² - 8·x³)/(1 - 24·x² + 16·x⁴). A164584