Properties of the Number 87402

Eighty-Seven Thousand Four Hundred Two

Basics

Value: 87401 → 87402 → 87403

Parity: even

Prime: No

Previous Prime: 87383

Next Prime: 87403

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 2081

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 2081, 4162

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10101010101101010

Octal: 252552

Duodecimal: 426B6

Hexadecimal: 1556a

Square: 7639109604

Square Root: 295.6382925129964

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

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0ⁿ and T(n,k) = k * ∑_r=0..n binomial(n,r) * binomial(n+3·r+k,n)/(n+3·r+k) for k > 0. A378237

Number of (n+4) X 10 0..2 matrices with each 5 X 5 subblock idempotent. A224623

T(n,k)=Number of (n+4)X(k+4) 0..2 matrices with each 5X5 subblock idempotent. A224625

a(n) is the smallest repdigit > 10 such that ∑_i=0..n a(i) is prime. A87402