Properties of the Number 42449

Forty-Two Thousand Four Hundred Forty-Nine

Basics

Value: 42448 → 42449 → 42450

Parity: odd

Prime: No

Previous Prime: 42443

Next Prime: 42451

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 17 × 227

Divisors: 1, 11, 17, 187, 227, 2497, 3859, 42449

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1010010111010001

Octal: 122721

Duodecimal: 20695

Hexadecimal: a5d1

Square: 1801917601

Square Root: 206.0315509818824

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 - x - x² + x³ - x⁷ + x⁹ - x¹¹). A147663

9-gonal (or enneagonal) pyramidal numbers: a(n) = n*(n+1)*(7·n-4)/6. A7584

O.g.f.: ∑_n>=0 n! * xⁿ * ∏_k=1..n (k + x) / (1 + k²*x + k·x²). A221370

a(n) = n*(2·n² + 5·n + 15)/2. A163673

Odd 9-gonal (nonagonal) pyramidal numbers. A218328

Least k > a(n-1) such that k³ has no digit in common with a(n-1) and a(n+1), a(0)=0. A294662

a(n) = (9·n/4 - 51/8 - 5/(16·n-24) + 1/n + 6/(n+1))*binomial(2·n-2,n-1). A344728

a(i)=a(i-1)+a(j₁)*a(j₂) {where j₁+j₂=i-1, j₁ <= q j₂} + a(j₁)*a(j₂)*a(j₃) {where j₁+j₂+j₃=i-1, j₁ <= q j₂ <= q j₃} +...+ a(1)^i-1. A27881

(Number of 4 X 4 pandiagonal magic squares with distinct positive entries less than n)/384. A317252

Denominators of continued fraction convergents to sqrt(752). A42449