Properties of the Number 75020

Seventy-Five Thousand Twenty

Basics

Value: 75019 → 75020 → 75021

Parity: even

Prime: No

Previous Prime: 75017

Next Prime: 75029

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 11 ² × 31

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 31, 44

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010010100001100

Octal: 222414

Duodecimal: 374B8

Hexadecimal: 1250c

Square: 5628000400

Square Root: 273.8977911557521

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

Expansion of 1/(1-x²-2·x³). A52947

a(n) = Fibonacci(n) - 5. A167616

Expansion of x²/(1-x²-2·x³). A159287

Moebius transform of Fibonacci numbers. A7436

Expansion of (1 + x)² / ((1 - x² - 2·x³)*(1 + x⁴)). A107849

s(k)-s(j), where the pairs (k,j) are given by A205877 and A205878, and s(k) denotes the (k+1)-st Fibonacci number. A205879

Number of compositions of n into odd and relatively prime parts. A108700

A054525·A000041. A133732

Diagonal sums of the Riordan array (1-4·x+4·x², x*(1-2·x)) (A167431). A167434

a(n) = binomial(n+5,5) + 4·binomial(n+4,5) + 4·binomial(n+3,5) + binomial(n+2,5). A244864