Properties of the Number -187425

One Hundred Eighty-Seven Thousand Four Hundred Twenty-Five

Basics

Value: -187426 → -187425 → -187424

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 ² × 7 ² × 17

Divisors: 1, 3, 5, 7, 9, 15, 17, 21, 25, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101101110000100001

Octal: -556041

Duodecimal: -90569

Hexadecimal: -2dc21

Square: 35128130625

Square Root: 432.92609068985433

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

The convolution matrix of the double factorial of odd numbers (A001147). A35342

Odd nondeficient numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. A386427

Expansion of 1/(1 - 10·x + 9·x²)^3/2. A331516

Odd nonsquares k for which A161942(k) >= k, where A161942 is the odd part of σ. A348743

a(n) = T(n,n+2), T given by A027052. A27053

E.g.f. x*(c(x/2)-1)/(1-2·x), where c(x) = g.f. for Catalan numbers A000108. A35101

Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords are contained within the marked chord. A336599

Number of regular polygons that can be drawn with vertices on a centered hexagonal grid with side length n. A339483

Triangle T(n, k, q) = t(n,q)/(t(k,q)*t(n-k,q)), where t(n, k) = ∏_j=1..n q-Pochhammer(j, k+1, k+1)/(1-(k+1))^j and t(n, 0) = n!, with q = 3, read by rows. A156952

Smallest number having exactly n divisors of the form 8·k + 1. A343104