Properties of the Number -1231231

Two Hundred Thirty-One Thousand Two Hundred Thirty-One

Basics

Value: -1231232 → -1231231 → -1231230

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 1231231

Divisors: 1, 1231231

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100101100100101111111

Octal: -4544577

Duodecimal: -4B4627

Hexadecimal: -12c97f

Square: 1515929775361

Square Root: 1109.6084895133058

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

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,2,3. A37610

Primes formed by concatenating k, k, and 1 for k >= 1. A210511

a(n) is the smallest number not already in the sequence, such that the concatenation of all a(n) displays the periodic digit string 1, 2, 3 (and repeat). A165301

Primes of the form 30030·p + 1 where p is a prime. A51651

Periodic primes: primes p whose decimal expansion can be written as sss...st, where s is nonempty string of digits not beginning with 0, there are at least two copies of s, and t (which may be absent) is a prefix of s. A232066

A triangle sequence based on a prime root product using a primorial function: f(n)=primorial(n); p(x,n)=If[n == 0, 1, f(n)*(x + 1/f(n))*Product[x + Prime[i], {i, 1, n - 1}]]; t(n,m)=coefficients(p(x,n)). A142583