Properties of the Number -145561

One Hundred Forty-Five Thousand Five Hundred Sixty-One

Basics

Value: -145562 → -145561 → -145560

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 13 × 11197

Divisors: 1, 13, 11197, 145561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100011100010011001

Octal: -434231

Duodecimal: -702A1

Hexadecimal: -23899

Square: 21188004721

Square Root: 381.52457325839447

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(1)=1, a(n+1) = a(n) + spf(∑_i=1..n a(i)), where spf=A020639 (smallest prime factor). A80180

a(n) = (n+1)*∑_i=0..n/2((binomial(n-i,i))*binomial(2*(n-2·i),(n-2·i))/(n-2·i+1)²). A270595