40042003 has 4 divisors (see below), whose sum is σ = 40161160. Its totient is φ = 39922848.

The previous prime is 40041997. The next prime is 40042007. The reversal of 40042003 is 30024004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40042003 - 2¹³ = 40033811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40042007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59073 + ... + 59746.

It is an arithmetic number, because the mean of its divisors is an integer number (10040290).

Almost surely, 2^40042003 is an apocalyptic number.

40042003 is a deficient number, since it is larger than the sum of its proper divisors (119157).

40042003 is a wasteful number, since it uses less digits than its factorization.

40042003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119156.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40042003 is about 6327.8750777809. The cubic root of 40042003 is about 342.1148543255.

Adding to 40042003 its reverse (30024004), we get a palindrome (70066007).

The spelling of 40042003 in words is "forty million, forty-two thousand, three".