42436423 has 2 divisors, whose sum is σ = 42436424. Its totient is φ = 42436422.

The previous prime is 42436421. The next prime is 42436439. The reversal of 42436423 is 32463424.

42436423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42436423 - 2¹ = 42436421 is a prime.

Together with 42436421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42436391 and 42436400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42436421) 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 as a sum of consecutive naturals, namely, 21218211 + 21218212.

It is an arithmetic number, because the mean of its divisors is an integer number (21218212).

Almost surely, 2^42436423 is an apocalyptic number.

42436423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42436423 is an equidigital number, since it uses as much as digits as its factorization.

42436423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 28.

The square root of 42436423 is about 6514.3244469400. The cubic root of 42436423 is about 348.8025007142.

Adding to 42436423 its reverse (32463424), we get a palindrome (74899847).

The spelling of 42436423 in words is "forty-two million, four hundred thirty-six thousand, four hundred twenty-three".