Properties of the Number 87481

Eighty-Seven Thousand Four Hundred Eighty-One

Basics

Value: 87480 → 87481 → 87482

Parity: odd

Prime: Yes

Previous Prime: 87473

Next Prime: 87491

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 87481

Divisors: 1, 87481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010110111001

Octal: 252671

Duodecimal: 42761

Hexadecimal: 155b9

Square: 7652925361

Square Root: 295.7718715496793

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

Pseudo-squares: a(n) = the least nonsquare positive integer which is 1 mod 8 and is a (nonzero) quadratic residue modulo the first n odd primes. A2189

Smallest prime p of form p = 8k+1 such that first n primes (p₁=2, ..., p_n) are quadratic residues mod p. A2224

Numbers whose least quadratic nonresidue (A020649) is 29. A25029

Primes at which occur records of A205531 and A205535. A205532

Number of points in Zⁿ of norm <= 2. A55426

Value of prime number D for incrementally largest values of minimal·satisfying the equation x² - D·y² = 5. A341079

Smallest prime p == 1 mod 8 (A007519) and p > prime(n+2) such that p is a quadratic residue mod the first n odd primes 3, 5, 7, 11, ..., prime(n+1), and p is a quadratic non-residue mod prime(n+2). A96637

Odd primes which set records for smallest absolute value of a quadratic nonresidue. A102295

a(n) is the smallest prime p such that 2^p-1 == 1 (mod a(1)*...*a(n-1)*p). A175257

Smallest nonsquare congruent to a square (mod k²) for all k = 1..n. A260709