42508423 has 2 divisors, whose sum is σ = 42508424. Its totient is φ = 42508422.

The previous prime is 42508421. The next prime is 42508441. The reversal of 42508423 is 32480524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42508423 - 2¹ = 42508421 is a prime.

Together with 42508421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42508391 and 42508400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42508421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21254211 + 21254212.

It is an arithmetic number, because the mean of its divisors is an integer number (21254212).

Almost surely, 2^42508423 is an apocalyptic number.

42508423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42508423 is an equidigital number, since it uses as much as digits as its factorization.

42508423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 42508423 is about 6519.8483878078. The cubic root of 42508423 is about 348.9996551749. Note that the first 3 decimals are identical.

Adding to 42508423 its reverse (32480524), we get a palindrome (74988947).

The spelling of 42508423 in words is "forty-two million, five hundred eight thousand, four hundred twenty-three".