The Number

4001

Four Thousand and One

Nearby Numbers

Positive, nonzero integers within three units

3998
Three Thousand Nine Hundred and Ninety-Eight
3999
Three Thousand Nine Hundred and Ninety-Nine
4000
Four Thousand
4002
Four Thousand and Two
4003
Four Thousand and Three
4004
Four Thousand and Four

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

4.001e3

Reciprocal

A number multiplied with its reciprocal is one.

0.00024993751562109475

The reciprocal of 4001.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 4001 is not a palindrome.

A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Four thousand and one is the 551st prime number.   See primes in Base 10 Decimal

Not A Composite

Composites have more than just these two factors.

Four Thousand and One is not a composite number because it has exactly two factors: One and Four Thousand and One

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number four thousand and one has the following 1 prime factor:

4001
Four Thousand and One

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

40011 = 4001

Base Conversions

The number four thousand and one in 35 different bases