Properties of the Number 40187

Forty Thousand One Hundred Eighty-Seven

Basics

Value: 40186 → 40187 → 40188

Parity: odd

Prime: No

Previous Prime: 40177

Next Prime: 40189

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 5741

Divisors: 1, 7, 5741, 40187

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001110011111011

Octal: 116373

Duodecimal: 1B30B

Hexadecimal: 9cfb

Square: 1614994969

Square Root: 200.46695488284348

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

Partial sums of A299272. A299273

Consider all Pythagorean triples (X,X+7,Z); sequence gives Z values. A76294

Column 8 of triangle A055898. A55904

Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array C(t,r) read by rows. A177020

"DHK" (bracelet, identity, unlabeled) transform of A035353. A35354

Semiprimes k such that k+2 and k+6 are primes and k+4 and k+8 are all semiprimes. A392186

Expansion of (1-x)^-1/(1-x+x²-2·x³). A77871

Number of partitions of primes into mutual coprimes > 1. A86191

Counterexamples to the conjecture that an even, prime-indexed triangular plus 1 equals a prime or that an odd, prime-indexed triangular minus 2 equals a prime. A97785

Continued fraction for sqrt(202). A40187