Properties of the Number -643204

Six Hundred Forty-Three Thousand Two Hundred Four

Basics

Value: -643205 → -643204 → -643203

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 401 ²

Divisors: 1, 2, 4, 401, 802, 1604, 160801, 321602, 643204

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10011101000010000100

Octal: -2350204

Duodecimal: -270284

Hexadecimal: -9d084

Square: 413711385616

Square Root: 802

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

Squares which are palindromes in base 3. A29985

T(n,k)=Number of length n+4 0..k arrays with some pair in every consecutive five terms totalling exactly k. A246892

T(n,k) = number of n X k arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2. A221139

Squares k such that, if k has d digits, k has at least one digit in common with every other d-digit square. A173943

Squares the sum of the squares of whose digits are squares. A61090

Numbers n such that max(τ(n),τ(n+1),τ(n+2),τ(n+3))- min(τ(n),τ(n+1),τ(n+2),τ(n+3)) = 1. A173156

Number of nX4 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2. A221135

Number of length n+4 0..3 arrays with some pair in every consecutive five terms totalling exactly 3. A246887

Number of length 6+4 0..n arrays with some pair in every consecutive five terms totalling exactly n. A246898

Squares not divisible by 10 with digits d₁, d₂, ... d_k such that d₁² + ... + d_k² is a square. A254959