Properties of the Number -40805

Forty Thousand Eight Hundred Five

Basics

Value: -40806 → -40805 → -40804

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 8161

Divisors: 1, 5, 8161, 40805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -1001111101100101

Octal: -117545

Duodecimal: -1B745

Hexadecimal: -9f65

Square: 1665048025

Square Root: 202.00247523235947

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) = 81·n² - 90·n + 26. A154295

Prime sieve of φ. A247861

a(n) = 4·prime(n)²+1. A60429

a(n) is the number of primes occurring between A053182(n) and A053183(n) (excluding the endpoints). A238399