Properties of the Number 42220

Forty-Two Thousand Two Hundred Twenty

Basics

Value: 42219 → 42220 → 42221

Parity: even

Prime: No

Previous Prime: 42209

Next Prime: 42221

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 2111

Divisors: 1, 2, 4, 5, 10, 20, 2111, 4222, 8444, 10555

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010010011101100

Octal: 122354

Duodecimal: 20524

Hexadecimal: a4ec

Square: 1782528400

Square Root: 205.47505931377657

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

Positions of A080299 in A014486. A80298

Recurrence sequence derived from the digits of the square root of 5 after its decimal point. A189893

Starting positions of strings of three 4's in the decimal expansion of π. A83615

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood. A273023

Numerators of continued fraction convergents to sqrt(636). A42220

Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 0 0 vertically. A207714