Properties of the Number 71221

Seventy-One Thousand Two Hundred Twenty-One

Basics

Value: 71220 → 71221 → 71222

Parity: odd

Prime: No

Previous Prime: 71209

Next Prime: 71233

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 67 × 1063

Divisors: 1, 67, 1063, 71221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001011000110101

Octal: 213065

Duodecimal: 35271

Hexadecimal: 11635

Square: 5072430841

Square Root: 266.8726287950864

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

Fibonacci sequence beginning 13, 9. A206609

Number of binary strings of length n with no substrings equal to 0001 0101 or 0110. A164469

Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=7, k=1 and l=-1. A177177

Numbers n such that there are exactly 4 primes p such that floor(n·log(n))+1<=p<=floor((n+1)*log(n+1))-1. A68362

Product of next n composite numbers. A71221

Number of primes in (n·log(n)..(n+1)*log(n+1)] semi-open intervals, n >= 1. A166712