Properties of the Number -1721764

Seven Hundred Twenty-One Thousand Seven Hundred Sixty-Four

Basics

Value: -1721765 → -1721764 → -1721763

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 11 × 109 × 359

Divisors: 1, 2, 4, 11, 22, 44, 109, 218, 359, 436

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110100100010110100100

Octal: -6442644

Duodecimal: -6B0484

Hexadecimal: -1a45a4

Square: 2964471271696

Square Root: 1312.1600512132657

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

Expansion of 1/(1 - 4·x + 5·x²). A99456

Imaginary part of (1+2i)ⁿ. A6496

a(n) = 5ⁿ*sin(2n·arctan(1/2)) or numerator of tan(2n·arctan(1/2)). A66770

Real part of (4 + 3i)ⁿ. A139030

Values of y such that x² + y² = 5ⁿ with·and y coprime and 0 < x < y. A230711

Let (A,B)=(a(2·n),a(2·n+1)), then (A,B) is (even,odd), gcd(A,B)=1 and A² + B² = 5ⁿ. Note: a(0)=0. A98122

Numbers k such that (k² - 14)/2 is a square. A77447

Largest leg in right triangle with relatively prime sides and hypotenuse 5ⁿ. A67312