Properties of the Number 72104

Seventy-Two Thousand One Hundred Four

Basics

Value: 72103 → 72104 → 72105

Parity: even

Prime: No

Previous Prime: 72103

Next Prime: 72109

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 9013

Divisors: 1, 2, 4, 8, 9013, 18026, 36052, 72104

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100110101000

Octal: 214650

Duodecimal: 35888

Hexadecimal: 119a8

Square: 5198986816

Square Root: 268.5218799278748

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

Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape V; triangle T(n,k), n>=0, 0<=k<=max(0,n-2+delta_n,3), read by rows. A247709

Triangle read by rows: numerators of the almost-Riordan array ( 3*(7 - 4·x + sqrt(1 - 8·x))/(24 - 48·x + 16·x² + (3·x - 3)*(1 - 4·x - sqrt(1 - 8·x))) | 24/(24 - 48·x + 16·x² + (3·x - 3)*(1 - 4·x - sqrt(1 - 8·x))), (1 - 4·x - sqrt(1 - 8·x))/(8·x) ). A389706

Numerators of continued fraction convergents to sqrt(994). A42924

Numbers n such that A242720(n) = prime(n)*(prime(n)+4)+3 and A242719(n) - A242720(n) = 2*(prime(n)-1). A247279

Smallest absolute value of discriminant of a real (not necessarily totally real) algebraic number field of degree n. A72104