Properties of the Number 11381

Eleven Thousand Three Hundred Eighty-One

Basics

Value: 11380 → 11381 → 11382

Parity: odd

Prime: No

Previous Prime: 11369

Next Prime: 11383

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 19 × 599

Divisors: 1, 19, 599, 11381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110001110101

Octal: 26165

Duodecimal: 6705

Hexadecimal: 2c75

Square: 129527161

Square Root: 106.68176976409794

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

Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 20. A50969

Number of subsets of {1..n} whose greatest element can be written as a (strictly) positive linear combination of the others. A365043

a(1) = 668; for n > 1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1). A105212

Number of connected graphs with one cycle of length 4. A368

a(0) = 1; a(n) = ∑_{k=0..floor((n-1)/3)} binomial(n-1,3·k) * a(k). A352045

a(n) = sum for all integer partitions of n of the number of distinct multiplicities in each partition. A373271

a(n) = (2·n³ + 9·n² + n + 24) / 6. A160805

a(n) = 1 + ∑_k=1..n-4 a(k) * a(n-k-4). A346076

Cube root of A030683. A30684

a(0)=a(1)=1, a(n) = a(n-1) + a(a(n-2) mod n). A215525