Properties of the Number 64921

Sixty-Four Thousand Nine Hundred Twenty-One

Basics

Value: 64920 → 64921 → 64922

Parity: odd

Prime: Yes

Previous Prime: 64919

Next Prime: 64927

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 64921

Divisors: 1, 64921

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110110011001

Octal: 176631

Duodecimal: 316A1

Hexadecimal: fd99

Square: 4214736241

Square Root: 254.7959968288356

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

Second term of weak prime septet: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3) < p(m+5)-p(m+4). A54835

First term of weak prime sextet: p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3) < p(m+5)-p(m+4). A54828

Second term of weak prime sextet: p(m)-p(m-1) < p(m+1)-p(m) < p(m+2)-p(m+1) < p(m+3)-p(m+2) < p(m+4)-p(m+3). A54829

Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes). A362578

Prime numbers such that the sum of any 2 or 4 consecutive terms are averages of twin prime pairs and sum of any 3 or 5 consecutive terms are primes. A153128

Iterate A064920 until a prime is reached. A64921