42002423 has 4 divisors (see below), whose sum is σ = 42015408. Its totient is φ = 41989440.

The previous prime is 42002383. The next prime is 42002431. The reversal of 42002423 is 32420024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42002423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42004423) 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, 2678 + ... + 9548.

It is an arithmetic number, because the mean of its divisors is an integer number (10503852).

Almost surely, 2^42002423 is an apocalyptic number.

42002423 is a deficient number, since it is larger than the sum of its proper divisors (12985).

42002423 is an equidigital number, since it uses as much as digits as its factorization.

42002423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12984.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 42002423 is about 6480.9276342203. The cubic root of 42002423 is about 347.6093488145.

Adding to 42002423 its reverse (32420024), we get a palindrome (74422447).

The spelling of 42002423 in words is "forty-two million, two thousand, four hundred twenty-three".