40001003 has 16 divisors (see below), whose sum is σ = 47040000. Its totient is φ = 33999336.

The previous prime is 40000993. The next prime is 40001021. The reversal of 40001003 is 30010004.

It is not a de Polignac number, because 40001003 - 2¹⁰ = 39999979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40001083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47258 + ... + 48096.

It is an arithmetic number, because the mean of its divisors is an integer number (2940000).

Almost surely, 2^40001003 is an apocalyptic number.

40001003 is a deficient number, since it is larger than the sum of its proper divisors (7038997).

40001003 is an equidigital number, since it uses as much as digits as its factorization.

40001003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 40001003 is about 6324.6346139520. The cubic root of 40001003 is about 341.9980478212.

Adding to 40001003 its reverse (30010004), we get a palindrome (70011007).

Subtracting from 40001003 its reverse (30010004), we obtain a palindrome (9990999).

The spelling of 40001003 in words is "forty million, one thousand, three".