Properties of the Number -115921

One Hundred Fifteen Thousand Nine Hundred Twenty-One

Basics

Value: -115922 → -115921 → -115920

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 37 × 241

Divisors: 1, 13, 37, 241, 481, 3133, 8917, 115921

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -11100010011010001

Octal: -342321

Duodecimal: -57101

Hexadecimal: -1c4d1

Square: 13437678241

Square Root: 340.4717315725345

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+1)³) - s, where s is the nearest square to (n²+1)³. A233149

Carmichael numbers: composite numbers k such that a^k-1 == 1 (mod k) for every a coprime to k. A2997

3-Carmichael numbers: Carmichael numbers equal to the product of 3 primes: k = p·q*r, where p < q < r are primes such that a^k-1 == 1 (mod k) if a is prime to k. A87788

Composite numbers k such that k == +-1 (mod 8) and 2^(k-1/2) == 1 (mod k). A6971

Pseudoprimes to both base 2 and base 3, i.e., intersection of A001567 and A005935. A52155

Terms of A324315 (squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p) that are also hexagonal numbers (A000384) with index equal to their largest prime factor. A324319

Pseudoprimes to bases 2, 3 and 5. A83737

Strong pseudoprimes to base 6. A20232

Composite numbers n with the property that φ(n) divides (n-1)². A173703

Composite numbers n such that gcd(φ(n), n-1) = λ(n), where λ(n) = A002322(n). A264012