Properties of the Number -1974

Nine Hundred Seventy-Four

Basics

Value: -1975 → -1974 → -1973

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 47

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 47, 94

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11110110110

Octal: -3666

Duodecimal: -1186

Hexadecimal: -7b6

Square: 3896676

Square Root: 44.429719783046124

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

Coefficients in the expansion of B⁷/C, in Watson's notation of page 118. A160534

Triangle read by rows : T(n,0) = n+1, T(n,k)=0 if k<0 or if k>n, T(n,k) = k·T(n-1,k) - T(n-1,k-1). A159881

Sum of the n-th antidiagonal in the triangle A192011. A198862

Derivative of log of A002126. A23901

Number of binary vectors of length n containing no singletons. A6355

Products of exactly four distinct primes. A46386

Layer counting sequence for hyperbolic tessellation by cuspidal triangles of angles (π/3,π/3,0) (this is the classical modular tessellation). A54886

a(n) = n*(n+5). A28557

Number of n-digit numbers N that do not end with 0 and are such that the reversal of N divides N but is different from N. A214927

Triangle of central factorial numbers |4^k t(2n+1,2n+1-2k)| read by rows (n>=0, k=0..n). A8956