Properties of the Number 87249

Eighty-Seven Thousand Two Hundred Forty-Nine

Basics

Value: 87248 → 87249 → 87250

Parity: odd

Prime: No

Previous Prime: 87223

Next Prime: 87251

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 127 × 229

Divisors: 1, 3, 127, 229, 381, 687, 29083, 87249

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010011010001

Octal: 252321

Duodecimal: 425A9

Hexadecimal: 154d1

Square: 7612388001

Square Root: 295.37941702156564

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

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713

Composite numbers k such that k == +-1 (mod 8) and 2^(k-1/2) == 1 (mod k). A6971

Composite numbers k == 1 (mod 4) such that (1 + i)^k == 1 + i (mod k), where i = sqrt(-1). A270698

Fermat pseudoprimes to base 2 with three prime factors. A215672

a(1) = 0, a(2) = 1; and for n > 2, a(n) = 2·a(A285712(n)) + [1 == (n mod 3)]. A292591

Pseudoprimes n to base 2 such that n+2 and n+4 are primes. A230489

Sarrus numbers n (A001567) which satisfy μ(n) = -1 and which are not Super-Poulet numbers (A050217). A74380

Lesser of pseudo twin primes to base 2. A192297

Pseudoprimes to a twin prime criterion of Aebi and Cairns. A224695

Smallest sets of 3 consecutive odd numbers that are primes or pseudoprimes (base 2). The initial odd number is listed. A230808