Properties of the Number 12958

Twelve Thousand Nine Hundred Fifty-Eight

Basics

Value: 12957 → 12958 → 12959

Parity: even

Prime: No

Previous Prime: 12953

Next Prime: 12959

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 11 × 19 × 31

Divisors: 1, 2, 11, 19, 22, 31, 38, 62, 209, 341

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001010011110

Octal: 31236

Duodecimal: 75BA

Hexadecimal: 329e

Square: 167909764

Square Root: 113.833211322531

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

Convolution of Catalan numbers and powers of 2. A14318

Composite n coprime to 5 such that Fibonacci(n) == Legendre(n,5) (mod n). A49062

-2-Knödel numbers. A225506

T(n,k)=Number of n X n 0..k arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order. A229774

T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. A278807

Composite n such that Fibonacci(n) == Legendre(n,5) == -1 (mod n). A94063

a(n) = n*(27·n - 1)/2. A22284

a(n) = 9n² - n. A154516

a(n) = a(n-1) + a(n-2) + (n+2)*binomial(n+3, 3)/2, with a(0) = 1, a(1) = 7. A54469

Expansion of ((1-4·x) + sqrt(1-4·x))/(2*(1-2·x)). A158495