Properties of the Number -245

Two Hundred Forty-Five

Basics

Value: -246 → -245 → -244

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 5 × 7 ²

Divisors: 1, 5, 7, 35, 49, 245

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110101

Octal: -365

Duodecimal: -185

Hexadecimal: -f5

Square: 60025

Square Root: 15.652475842498529

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

Euler transform of negative integers. A73592

Alternating sum σ(1)-σ(2)+σ(3)-σ(4)+...+((-1)ⁿ⁺¹)*σ(n). A68762

Coefficients of the '6th-order' mock θ function ψ(q). A53269

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

Matrix log of triangle A111830, which shifts columns left and up under matrix 7th power; these terms are the result of multiplying each element in row n and column k by (n-k)!. A111833

Dirichlet g.f.: 1 / ζ(s)⁷. A341833

Triangle T(n, k) = ∏_j=1..k ∏_i=0..j-1 ( 1 - (n-k+1)*(2·i-1) ) with T(n, 0) = 1 and T(n, n) = n!, read by rows. A156699

Expansion of (1-x)/(1-x+x³). A78013

Coefficient table for sums of squares of Chebyshev's S-Polynomials. A128495

Triangle formed by coefficients of the expansion of p(x, n), where p(x,n) = (1+x-x³)ⁿ⁺¹*∑_{j >= 0} (j+1)ⁿ*(-x + x³)^j. A156896