Properties of the Number 90121

Ninety Thousand One Hundred Twenty-One

Basics

Value: 90120 → 90121 → 90122

Parity: odd

Prime: Yes

Previous Prime: 90107

Next Prime: 90127

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 90121

Divisors: 1, 90121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110000000001001

Octal: 260011

Duodecimal: 441A1

Hexadecimal: 16009

Square: 8121794641

Square Root: 300.20159892978586

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

Primes with 23 as smallest positive primitive root. A61335

Primes that are the first in a run of exactly 4 emirps. A346024

a(n) = the numerator of the continued fraction [[n/1];[n/2],[n/3],..,[n/n]] = the numerator of [[n/n];[n/(n-1)],[n/(n-2)],..,[n/1]], where [x] is floor(x). A128599

Balanced primes of order thirteen. A300364

Emirps with a single 2 as the only prime digit. A179033

Primes of the form: concatenation n with n-th composite integer. A246801

Primes of the form 16n² + 121. A202083

Smallest m such that the period of the continued fraction of sqrt(m) is A215485(n); records of A013646. A215508

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 54. A31642

If n = 2·m then a(n) = binomial(3·m, m)/(2·m+1), if n=2·m+1 then a(n) = binomial(3·m+1, m+1)/(2·m+1). A47749