42003123 has 4 divisors (see below), whose sum is σ = 56004168. Its totient is φ = 28002080.

The previous prime is 42003119. The next prime is 42003127. The reversal of 42003123 is 32130024.

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

It is an interprime number because it is at equal distance from previous prime (42003119) and next prime (42003127).

It is a cyclic number.

It is not a de Polignac number, because 42003123 - 2² = 42003119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42003127) 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, 7000518 + ... + 7000523.

It is an arithmetic number, because the mean of its divisors is an integer number (14001042).

Almost surely, 2^42003123 is an apocalyptic number.

42003123 is a deficient number, since it is larger than the sum of its proper divisors (14001045).

42003123 is a wasteful number, since it uses less digits than its factorization.

42003123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14001044.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 42003123 is about 6480.9816386100. The cubic root of 42003123 is about 347.6112798554.

Adding to 42003123 its reverse (32130024), we get a palindrome (74133147).

The spelling of 42003123 in words is "forty-two million, three thousand, one hundred twenty-three".