Properties of the Number -1240

Two Hundred Forty

Basics

Value: -1241 → -1240 → -1239

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 31

Divisors: 1, 2, 4, 5, 8, 10, 20, 31, 40, 62

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011011000

Octal: -2330

Duodecimal: -874

Hexadecimal: -4d8

Square: 1537600

Square Root: 35.21363372331802

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

Matrix inverse of triangle A022166. A135950

Triangle read by rows generated from (x-1)*(x-2)*(x-4)*... A158474

Poly-Cauchy numbers c_n^-4. A222748

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where A(n,k) is the n-th term of the inverse Stirling transform of j-> (j+1)^k. A383049

Difference between sums of quadratic residues and non-residues modulo n that are coprime to n. A255643

Expansion of 1 / ∑_{k in Z} x^k / (1 - x^5·k+1). A375062

Hankel transform of A052702. A160705

G.f. satisfies A(x) = 1 + x·A(x) - x²*A(x)³. A367028

Coefficients of modular function G₃(τ). A5761

Expansion of ∏_n>=0 (1 + q*(-q²)ⁿ) / (1 - q*(-q²)ⁿ). A193863