42003004123 has 4 divisors (see below), whose sum is σ = 42152481288. Its totient is φ = 41853526960.

The previous prime is 42003004061. The next prime is 42003004139. The reversal of 42003004123 is 32140030024.

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 42003004123 - 2⁹ = 42003003611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42003004123.

It is not an unprimeable number, because it can be changed into a prime (42003104123) 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, 74738161 + ... + 74738722.

It is an arithmetic number, because the mean of its divisors is an integer number (10538120322).

Almost surely, 2^42003004123 is an apocalyptic number.

42003004123 is a deficient number, since it is larger than the sum of its proper divisors (149477165).

42003004123 is a wasteful number, since it uses less digits than its factorization.

42003004123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149477164.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 42003004123 its reverse (32140030024), we get a palindrome (74143034147).

The spelling of 42003004123 in words is "forty-two billion, three million, four thousand, one hundred twenty-three".