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Properties of the Number 87281

Eighty-Seven Thousand Two Hundred Eighty-One

Basics

Value: 87280 → 87281 → 87282

Parity: odd

Prime: Yes

Previous Prime: 87277

Next Prime: 87293

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 87281

Divisors: 1, 87281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10101010011110001

Octal: 252361

Duodecimal: 42615

Hexadecimal: 154f1

Square: 7617972961

Square Root: 295.4335796757031

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

Numbers of uniquely embeddable trees on n vertices. A378672
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1100-0110-0011 pattern in any orientation. A147143
Number of ways to write n as a*(a+1)/2 + b*(b+1)/2 + 2c + 2d, where a,b,c,d are nonnegative integers with a <= b, c <= d and 2∣c. A303363
Numbers that cannot be expressed as the sum of two nonzero squares and at most two powers of two. A273812
a(n) = Lucas(7·n). A87281
Irregular triangle read by rows, where row n lists in ascending order all numbers k whose arithmetic derivative k' is equal to the n-th partial sum of primorials, A143293(n). Rows of length zero are simply omitted, i.e., when A369239(n) = 0. A369240
Number of ways to write n as x2 + yk + 2a + 2b, where x,y,a,b are nonnegative integers with x >= y and a >= b, and k is either 2 or 3. A349787