Properties of the Number 15430

Fifteen Thousand Four Hundred Thirty

Basics

Value: 15429 → 15430 → 15431

Parity: even

Prime: No

Previous Prime: 15427

Next Prime: 15439

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 1543

Divisors: 1, 2, 5, 10, 1543, 3086, 7715, 15430

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110001000110

Octal: 36106

Duodecimal: 8B1A

Hexadecimal: 3c46

Square: 238084900

Square Root: 124.21755109484327

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 integer partitions of n such that, for all parts·of multiplicity 1, either x - 1 or x + 1 is also a part. A355393

The exponential transform of σ(n). A274804

Expansion of g.f. A(x) satisfying A(x) = A( x²*(1+x)² ) / (x*(1+x)). A369545

A Wallis pair (x,y) satisfies σ(x²) = σ(y²); sequence gives x's for indecomposable Wallis pairs with x < y (ordered by values of x). A75768

a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0, s(1) = 1, s(n) = 3, |s(i) - s(i-1)| <= 1 for i >= 2, |s(2) - s(1)| = 1, |s(3) - s(2)| = 1 if s(2) = 1. Also a(n) = T(n,n-3), where T is the array in A026268. A26289

Numbers k such that φ(k) + φ(k+3) = φ(k+1) + φ(k+2). A76665

Expansion of 1/(g * (2 - g²)), where g = 1+x·g² is the g.f. of A000108. A391516

Pell-Lucas numbers: numerators of continued fraction convergents to sqrt(2). A1333

a(n) = numerator of the X-coordinate of n·P where P is the generator [0,0] for rational points on the curve y² + y = x³ - x. A28940

Denominator of y coordinate of n·P where P is the generator [0,0] for rational points on curve y²+y = x³-x. A28943