Properties of the Number 64240

Sixty-Four Thousand Two Hundred Forty

Basics

Value: 64239 → 64240 → 64241

Parity: even

Prime: No

Previous Prime: 64237

Next Prime: 64271

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁴ × 5 × 11 × 73

Divisors: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111101011110000

Octal: 175360

Duodecimal: 31214

Hexadecimal: faf0

Square: 4126777600

Square Root: 253.4561105990542

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

Table of coefficients of polynomials related to the Dirichlet η function. A156919

Triangle read by rows, coefficients of the polynomials P(k, x) = (1/2) ∑_p=0..k-1 Stirling2(k, p+1)*x^p*(1-4·x)^k-1-p*(2·p+2)!/(p+1)!. A142963

T(n,k) is the number of (n+1) X (k+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings). A234564

A triangular decomposition of the double factorial numbers A001147. A185411

Number of digraphs on n labeled nodes with a global source and sink. A350790

A decomposition of the double factorials A001147. A185410

a(n) = 6ⁿ-n⁸. A24070

Monotonic ordering of nonnegative differences 4ⁱ-6^j, for 40>= i>=0, j>=0. A192163

Numbers n not of the form i²+(i+1)² such that there are integers a < b with a²+(a+1)²+...+(n-1)² = n²+(n+1)²+...+b². A94523

Number of (n+1) X (2+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant-stress 1 X 1 tilings). A234558