Properties of the Number 40021

Forty Thousand Twenty-One

Basics

Value: 40020 → 40021 → 40022

Parity: odd

Prime: No

Previous Prime: 40013

Next Prime: 40031

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 31 × 1291

Divisors: 1, 31, 1291, 40021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001110001010101

Octal: 116125

Duodecimal: 1B1B1

Hexadecimal: 9c55

Square: 1601680441

Square Root: 200.0524931111832

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

Least nonnegative integer that cannot be expressed as the determinant of an n X n matrix whose entries are a permutation of the multiset {1ⁿ, ..., nⁿ}. A322576

Number of unbranched tri-4-catafusenes under the symmetry point group C_2v as a function of the number of hexagons (see Cyvin et al. (1996) for precise definition). A323939

a(n) = binomial(n+3, 4) + binomial(n+1, 3) + 1. A368881

Numbers k with the property that k is the next lexicographically earliest number that cannot be expressed as a linear sum of the squares of preceding terms of the sequence with coefficients of 0, +1 or -1, with a(1)=1. A390487

Numbers n with property that 42·n+37 is in A175284. A175285

Continued fraction for sqrt(27). A40021