Properties of the Number -145

One Hundred Forty-Five

Basics

Value: -146 → -145 → -144

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 5 × 29

Divisors: 1, 5, 29, 145

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10010001

Octal: -221

Duodecimal: -101

Hexadecimal: -91

Square: 21025

Square Root: 12.041594578792296

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

Alternating sum of the first n Fibonacci numbers. A119282

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of ∏_j>=1 (1 - j·x^j)^k. A297323

Expansion of ∏_k>=1 (1 + x^8·k)/(1 + x^k). A261735

a(n) = 3·a(n-2) - a(n-3) with a(0)=-1, a(1)=1, a(2)=-4. A214779

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

Expansion of g.f. -x/(1+x-x³). A104769

The y-coordinates of the vertices of the Babylonian Wurm. A342623

G.f. A(x) satisfies A(x) = 1 + x / ((1+x)³*A(x)²). A366499

Staircase of coefficients of polynomials used for column g.f.s of triangle A060923. A61186

Expansion of (1-x)/(1-x+x³). A78013