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Properties of the Number 16861

Sixteen Thousand Eight Hundred Sixty-One

Basics

Value: 16860 → 16861 → 16862

Parity: odd

Prime: No

Previous Prime: 16843

Next Prime: 16871

Digit Sum: 22

Digital Root: 4

Palindrome: Yes

Factorization: 13 × 1297

Divisors: 1, 13, 1297, 16861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000111011101

Octal: 40735

Duodecimal: 9911

Hexadecimal: 41dd

Square: 284293321

Square Root: 129.84991336154215

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

Palindromic in bases 10 and 36. A250412
Smallest k such that 33k mod k = n. A178194
Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. exp(∑j=1..k j·xj). A293718
In base 4, n sets a new record for the number of Reverse and Add! steps needed to reach a palindrome starting with n. A75686
a(1) = 1; then the smallest number such that both the forward and reverse n-th partial concatenation is a prime for n > 1. A83992
a(n) = 9·n3 - 18·n2 + 10·n. A86605
Palindromic mountain numbers. A173070
In base 4, smallest number that requires n Reverse and Add! steps to reach a palindrome. A77441
a(1) = 2; then least palindrome greater than the previous term such that every partial concatenation is a prime. A88084
Sum of median parts of all partitions of n into an odd number of distinct parts. A268359