Properties of the Number -75

Seventy-Five

Basics

Value: -76 → -75 → -74

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 ²

Divisors: 1, 3, 5, 15, 25, 75

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1001011

Octal: -113

Duodecimal: -63

Hexadecimal: -4b

Square: 5625

Square Root: 8.660254037844387

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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 read by rows: T(n,k) = T(n-1,k-1) + T(n-1,k), 0 < k < n with T(n,0) = n and T(n,n) = -n. A214292

Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n as Sum(k=0..n)T(n,k)*binomial(n,k). A244142

Riordan array ((1-2x)/(1-x), x/(1-x)). A112467

Triangle read by rows: T(n,k) (1 <= k <= n) given by T(n,1) = T(n,n) = 1, otherwise T(n, k) = (m·n-m·k+1)*T(n-1,k-1) + (m·k-m+1)*T(n-1,k), where m = -1. A144431

Lower triangular array T(n,k) generator for group of arrays related to A001147 and A102625. A132382

a(n) = ∑_k=1..n μ(k)*k, where μ(k) is the Moebius function. A68340

Riordan array (1,c(-x)), where c(x) = g.f. of Catalan numbers. A99039

Signed denominators of Leibniz series for π/4. A157142

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 9. A51523

Inverse of the Motzkin triangle A064189. A104562