Properties of the Number 42273

Forty-Two Thousand Two Hundred Seventy-Three

Basics

Value: 42272 → 42273 → 42274

Parity: odd

Prime: No

Previous Prime: 42257

Next Prime: 42281

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 11 × 61

Divisors: 1, 3, 7, 9, 11, 21, 33, 61, 63, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010100100001

Octal: 122441

Duodecimal: 20569

Hexadecimal: a521

Square: 1787006529

Square Root: 205.60398828816525

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 e.g.f. exp(-x * (1 - x)) / (1 - x). A375409

Expansion of e.g.f. 1/(1 + (exp(x) - 1)⁵ / 120). A354394

a(n) = Fibonacci(2·n)-2ⁿ+1. A47790

Triangle read by rows T(n, k) = ∑_h>=0 Bernoulli(h)*binomial(k+h-1, h)*abs(Stirling1(n, h+k))*n^h for n>=0 and 0<=k<=n. A339207

Row sums of A339033. A339034

a(n) = F(n+2) - 2^[ (n+1)/2 ] - 2^[ n/2 ] + 1. A5673

Integer part of log(n!)^{1 + log(log(1 + n})). A62475

G.f.: x³*(2·x-1) / ((1-x)*(1-x-x²)*(1-2·x²)). A174959

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, 1), (1, 0, -1), (1, 1, 1)}. A150721

a(n) = Fibonacci(n-2) + 2·a(n-2) - (n mod 2). A192727