Properties of the Number 13491

Thirteen Thousand Four Hundred Ninety-One

Basics

Value: 13490 → 13491 → 13492

Parity: odd

Prime: No

Previous Prime: 13487

Next Prime: 13499

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 1499

Divisors: 1, 3, 9, 1499, 4497, 13491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010010110011

Octal: 32263

Duodecimal: 7983

Hexadecimal: 34b3

Square: 182007081

Square Root: 116.15076409563564

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 even-length integer partitions of n with integer alternating product. A347704

Composite numbers k such that digits in k and in juxtaposition of prime factors of k are the same (apart from multiplicity). A35141

Members of 3-cycles of permutation A111273. A113701

Number of (w,x,y,z) with all terms in {1,...,n} and w²>=x·y*z. A212064

Indices where the cumulative sum of sin(2k+1)^2k+1 reaches a record high value. A387706

Solution (a(n)) of the complementary equation in Comments. A298877

Number of partitions of n with ten parts in which no part occurs more than twice. A320598

Becomes prime after exactly 7 iterations of f(x) = sum of prime factors of x. A47826

a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the pairwise differences of elements are distinct, and for 1<m<n, a(m) does not divide a(n). A256062

a(n) is the number of ways to select an ordered pair of subsets of {2,...,n} such that each pair of elements from different subsets are relatively prime. A260185