Properties of the Number 40085

Forty Thousand Eighty-Five

Basics

Value: 40084 → 40085 → 40086

Parity: odd

Prime: No

Previous Prime: 40063

Next Prime: 40087

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 8017

Divisors: 1, 5, 8017, 40085

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110010010101

Octal: 116225

Duodecimal: 1B245

Hexadecimal: 9c95

Square: 1606807225

Square Root: 200.21238722916223

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 k such that prime(k+1) == 1 (mod k). A105286

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. A301615

Number of nX4 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. A301611

Number of nX5 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. A301612

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 17. A51982

Expansion of ∏_k>=1 1/(1 - x^prime(k))^A056768(k). A321508

Primes p such that x³ = 20 has a solution mod p. A40085