Properties of the Number -1145

One Hundred Forty-Five

Basics

Value: -1146 → -1145 → -1144

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 229

Divisors: 1, 5, 229, 1145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -10001111001

Octal: -2171

Duodecimal: -7B5

Hexadecimal: -479

Square: 1311025

Square Root: 33.83784863137726

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-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 4. A60023

Matrix inverse of triangle A107862. A107865

Expansion of (1+3·x+14·x²-10·x³-10·x⁴+16·x⁵+15·x⁶-15·x⁷-2·x⁸+4·x⁹+8·x¹⁰) / ((1+4·x²)*(1-x²+x⁴)*(1+x²)²). A112522

a(1) = 1; a(n+1) = a(n) +- (sum of digits of a(1) up to a(n)), with "+" when a(n) is odd, or "-" if even. A332058

Expansion of (1/x) * Series_Reversion( x*(1+x-x⁵)/(1+x) ). A366101

Column 0 of triangle A107865. A107866

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 483", based on the 5-celled von Neumann neighborhood. A272346

A triangular sequence of polynomial coefficients: {a,b,c,d}={4, 5, 5, 0}; p(x,n)=(-1)ⁿ*(1 - d - c x)^{n + 1}*Sum[(a·k + b)ⁿ*(c·x + d)^k, {k, 0, Infinity}]. A154630

Numbers m such that the Bernoulli number B_2·m has denominator 66. A51229

Generalized 23-gonal (or icositrigonal) numbers: m*(21·m - 19)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303303