Properties of the Number -258121

Two Hundred Fifty-Eight Thousand One Hundred Twenty-One

Basics

Value: -258122 → -258121 → -258120

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 359 × 719

Divisors: 1, 359, 719, 258121

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111111000001001001

Octal: -770111

Duodecimal: -105461

Hexadecimal: -3f049

Square: 66626450641

Square Root: 508.0560992646383

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

Triangular numbers which are the product of two primes. A68443

Product p·q of two primes with q = 2·p + 1. A156592

Squarefree numbers (from A005117) with prime divisors in a 2p+1 progression. A231966

Lexicographically earliest sequence of pairwise coprime triangular numbers. A34792

Triangular numbers that are also brilliant (A078972). A113940

Numbers n such that A229964(n) = 1. A229965

Numbers k with the property that the symmetric representation of σ(k) has four parts, each of width one and two regions meet at the center of the Dyck path. A264104

Triangular numbers in which the k-th significant digit either divides k or is a multiple of k. A69559

Triangular numbers in A062918. A69792

Semiprimes of form p·q with p < q, such that 2^p - 1 == 0 (mod q). A179768