41 in words

Ways to write it

As an ordinal

forty-first

Roman numeral

XLI

Expanded form

40 + 1

Place value

Number facts

Even or odd

Odd

Prime or composite

Prime

Factors

1 and 41 (2 factors)

First 10 multiples

41, 82, 123, 164, 205, 246, 287, 328, 369, 410

Square

41 × 41 = 1,681

Square root

≈ 6.40

Sum of the digits

4 + 1 = 5

Rounded to the nearest 10

40

Number before

40

Number after

42

In binary

101001

Quick check

1. What number comes just after 41?

   Show the answer

   42

2. Is 41 even or odd?

   Show the answer

   Odd

3. What is 41 + 10?

   Show the answer

   51

Practise with a game

Count with Me

Count pictures up to 5, 10 or 20 and compare groups.

Place Value Quest

Ones, tens, hundreds and thousands.

Times Tables Challenge

Practise any times table from 2× to 12×.

Frequently asked questions