Properties of the Number 12946

Twelve Thousand Nine Hundred Forty-Six

Basics

Value: 12945 → 12946 → 12947

Parity: even

Prime: No

Previous Prime: 12941

Next Prime: 12953

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 6473

Divisors: 1, 2, 6473, 12946

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010010010

Octal: 31222

Duodecimal: 75AA

Hexadecimal: 3292

Square: 167598916

Square Root: 113.78049041905207

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

G.f. satisfies: A(x) = (1+x) * A(x²)*A(x³)*A(x⁴)*...*A(xⁿ)*... A129373

Irregular table read by rows: T(n,k) is the number of k-gons, k>=2, among all distinct circles that can be constructed from the 3 vertices and the equally spaced 3·n points placed on the sides of an equilateral triangle, using only a compass. A372617

a(n) = 1681·n² - 756·n + 85. A157010

a(0)=0, a(1)=1; and a(n) = a(n-1) + a(a(n-1) mod n) for n>=2. A125204

Numbers k such that 3·2^k + 7 is prime. A59746

Triangle read by rows, where t(n,1) = 1, t(n,m) = t(n,m-1) + (largest nonprime {1 or composite} in row {n-1}). A120853

The sequence b[n] defined in A126940. A126946

Number of maximal irredundant sets in the n-gear graph. A290640

Number of compositions of n where every distinct subsequence (not necessarily contiguous) has a different sum. A334268

a(n) = 7 + floor((2 + ∑_j=1..n-1 a(j))/3). A120153