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Properties of the Number -7145

One Hundred Forty-Five

Basics

Value: -7146 → -7145 → -7144

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 1429

Divisors: 1, 5, 1429, 7145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -1101111101001

Octal: -15751

Duodecimal: -4175

Hexadecimal: -1be9

Square: 51051025

Square Root: 84.52810183601665

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

a(n) = 5·a(n-1) + a(n-2); with a(1)=5, a(2)=1. A189745
Number of combinatorial types of simplicial n-dimensional polytopes with n+3 nodes. A943
Number of permutations of length n which avoid the patterns 123 and 4312. A116699
Array read by antidiagonals, arising from study of remixing keys in public-key cryptography. A265080
Conjecturally, number of infinitely-recurring prime patterns on n consecutive integers. A23192
T(n,k)=Number of nXk 0..7 arrays with no element equal to another at a city block distance of exactly two, and new values 0..7 introduced in row major order. A222894
G.f.: (1 + 5·x + 5·x2 + x3)/∏i=1..10 (1 - xi). A256977
Smallest number which can be written as the sum of distinct Fibonacci numbers in n ways and such that the Zeckendorf representation of the number uses only even-subscripted Fibonacci numbers. A46815
Number of n-crossing links with alternating braids of 3 strands. A94029
Number of n-crossing 2 component links with alternating braids of 3 strands. A94031