42040003 has 4 divisors (see below), whose sum is σ = 42080688. Its totient is φ = 41999320.

The previous prime is 42039967. The next prime is 42040007. The reversal of 42040003 is 30004024.

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 42040003 - 2¹³ = 42031811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42040007) 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, 18751 + ... + 20872.

It is an arithmetic number, because the mean of its divisors is an integer number (10520172).

Almost surely, 2^42040003 is an apocalyptic number.

42040003 is a deficient number, since it is larger than the sum of its proper divisors (40685).

42040003 is a wasteful number, since it uses less digits than its factorization.

42040003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40684.

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

The square root of 42040003 is about 6483.8262623238. The cubic root of 42040003 is about 347.7129877986.

Adding to 42040003 its reverse (30004024), we get a palindrome (72044027).

The spelling of 42040003 in words is "forty-two million, forty thousand, three".