Properties of the Number 1974

One Thousand Nine Hundred Seventy-Four

Basics

Value: 1973 → 1974 → 1975

Parity: even

Prime: No

Previous Prime: 1973

Next Prime: 1979

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

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

Exponential Riordan array (1, arcsin(x)). A385343

a(n) = n*(5·n+1)/2. A5475

Expansion of (1/theta₄ - 1)/2. A14968

Expansion of g.f. x*(1+x+x²)/(1-x-x²). A128588