Properties of the Number -975

Nine Hundred Seventy-Five

Basics

Value: -976 → -975 → -974

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ² × 13

Divisors: 1, 3, 5, 13, 15, 25, 39, 65, 75, 195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -1111001111

Octal: -1717

Duodecimal: -693

Hexadecimal: -3cf

Square: 950625

Square Root: 31.22498999199199

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

Triangle of coefficients of a version of the Hermite polynomials defined by P(x, n) = x·P(x, n - 1) - n·P(x, n - 2). A137286

G.f. satisfies: A(x + A(x)²) = x + 2·A(x)². A277306

Triangle read by rows: matrix cube of the Stirling-1 triangle A008275. A39815

Glaisher's function θ(n) (18 squares version). A2614

Expansion of e.g.f. (log(1 + log(1 + log(1+ x))))² / 2. A351525

a(n) = 7ⁿ - n¹⁰. A24085

Triangular matrix T, read by rows, that satisfies: [T^-k](n,k) = -T(n,k-1) for n >= k > 0, or, equivalently, (column k of T^-k) = -SHIFT_LEFT(column k-1 of T) when zeros above the diagonal are ignored. Also, matrix inverse of triangle A107876. A107889

sech(exp(x)-sec(x))=1-1/2!*x²+1/4!*x⁴+20/5!*x⁵+23/6!*x⁶... A13339

Integral form of A137286: Triangle of coefficients of Integral form of recursive orthogonal Hermite polynomials given in Hochstadt's book: n·IP(x, n) = x·P(x, n ) - n·P'(x, n - 2); derived to a constant from the differential recursion: P''(x,n)=x·P'(x,n)-n·P(x,n). A136262

a(n) = 13 + 12·n - n². A136316