Properties of the Number -41905

Forty-One Thousand Nine Hundred Five

Basics

Value: -41906 → -41905 → -41904

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 17 ² × 29

Divisors: 1, 5, 17, 29, 85, 145, 289, 493, 1445, 2465

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010001110110001

Octal: -121661

Duodecimal: -20301

Hexadecimal: -a3b1

Square: 1756029025

Square Root: 204.70710783946902

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

a(n) = n²*(n² + 1)/2. A37270

Triangular numbers which have one or more occurrences of exactly five different digits. A241788

a(n) = (A278399(n)² + A278400(n)²)/2. A278420

The number of distinct lines defined by an n X n X n grid of points. A222267

Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace. A210378

Triangular numbers whose external digits as well as internal digits form triangular numbers. A77368

Row sums of the triangle A045975. A204558

Number of compositions of n containing no part p of multiplicity p. A336269

Semiperimeter of the unique primitive Pythagorean triple whose inradius is A000045(n) and such that its long leg and its hypotenuse are consecutive natural numbers. A382609

Triangular numbers which are the sum of two squares. A73613