42403423 has 8 divisors (see below), whose sum is σ = 46446480. Its totient is φ = 38532480.

The previous prime is 42403409. The next prime is 42403433. The reversal of 42403423 is 32430424.

42403423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42403423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42403394 and 42403403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42403433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42513 + ... + 43498.

It is an arithmetic number, because the mean of its divisors is an integer number (5805810).

Almost surely, 2^42403423 is an apocalyptic number.

42403423 is a deficient number, since it is larger than the sum of its proper divisors (4043057).

42403423 is a wasteful number, since it uses less digits than its factorization.

42403423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86057.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 42403423 is about 6511.7910746583. The cubic root of 42403423 is about 348.7120637212.

Adding to 42403423 its reverse (32430424), we get a palindrome (74833847).

The spelling of 42403423 in words is "forty-two million, four hundred three thousand, four hundred twenty-three".