42022423 has 2 divisors, whose sum is σ = 42022424. Its totient is φ = 42022422.

The previous prime is 42022399. The next prime is 42022427. The reversal of 42022423 is 32422024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42022423 - 2⁹ = 42021911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42022423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42022427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21011211 + 21011212.

It is an arithmetic number, because the mean of its divisors is an integer number (21011212).

Almost surely, 2^42022423 is an apocalyptic number.

42022423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42022423 is an equidigital number, since it uses as much as digits as its factorization.

42022423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 42022423 is about 6482.4704395778. The cubic root of 42022423 is about 347.6645129639.

Adding to 42022423 its reverse (32422024), we get a palindrome (74444447).

The spelling of 42022423 in words is "forty-two million, twenty-two thousand, four hundred twenty-three".