Properties of the Number -39581

Thirty-Nine Thousand Five Hundred Eighty-One

Basics

Value: -39582 → -39581 → -39580

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 39581

Divisors: 1, 39581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -1001101010011101

Octal: -115235

Duodecimal: -1AAA5

Hexadecimal: -9a9d

Square: 1566655561

Square Root: 198.94974239742055

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) = Lucas(n+1) - (n+1). A66982

Primes that are the sum of two squares and which set a record for the gap to the next prime of that form. A84161

Primes p such that q-p = 26, where q is the next prime after p. A124594

First occurrence prime gaps of the primes in sequence A002313 (Real primes with corresponding complex primes). a(0) = 2 with length of gap 3. For n>0 the size of the gap in the sequence is 4n, a(n) is the starting prime of the gap. A84160

Numbers k such that k² contains only digits {1,5,6}. A53902

a(n) is the smallest prime p such that there are n numbers between p and nextprime(p) which are not prime powers. A368749

Indices of primes in sequence defined by A(0) = 59, A(n) = 10·A(n-1) - 41 for n > 0. A101581

Consecutive Pythagorean primes p = A002144(r) and q = A002144(r+1) such that q - p > log(p)². The number a(n) is the n-th value of p. A216924

Number of n X 3 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero. A304136

Primes p such that neither g-1 nor g+1 is prime, where g is the gap from p to the next prime. A355485