Properties of the Number 20161

Twenty Thousand One Hundred Sixty-One

Basics

Value: 20160 → 20161 → 20162

Parity: odd

Prime: Yes

Previous Prime: 20149

Next Prime: 20173

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 20161

Divisors: 1, 20161

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 100111011000001

Octal: 47301

Duodecimal: B801

Hexadecimal: 4ec1

Square: 406465921

Square Root: 141.98943622678414

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 of the form (k! + 2)/2. A89130

Numbers k such that (11^k - 1)/10 is prime. A5808

Primes of the form 5k² + 5k + 1. A90562

Primes that divide at least one term of Sylvester's sequence s = A000058: s(n+1) = s(n)² - s(n) + 1, s(0) = 2. A7996

Primes p for which the period of reciprocal 1/p is (p-1)/12. A56217

Luhn primes: primes p such that p + (p reversed) is also a prime. A61783

Primes of the form 9x² + 6xy + 1849y². A244019

Prime number spiral (clockwise, East spoke). A54555

Primes p such that τ(p-1)+τ(p+1) is larger than for any previous term. (Smallest prime sandwiched between more composite numbers.) A90481

Sum of distinct terms of A002674: a(0) = 0, a(2n) = A255411(A153880(a(n))), a(2n+1) = 1+A255411(A153880(a(n))). A275959