420242423 has 2 divisors, whose sum is σ = 420242424. Its totient is φ = 420242422.

The previous prime is 420242419. The next prime is 420242441. The reversal of 420242423 is 324242024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420242423 - 2² = 420242419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420242623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210121211 + 210121212.

It is an arithmetic number, because the mean of its divisors is an integer number (210121212).

Almost surely, 2^420242423 is an apocalyptic number.

420242423 is a deficient number, since it is larger than the sum of its proper divisors (1).

420242423 is an equidigital number, since it uses as much as digits as its factorization.

420242423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 420242423 is about 20499.8151942889. The cubic root of 420242423 is about 749.0312963192.

Adding to 420242423 its reverse (324242024), we get a palindrome (744484447).

The spelling of 420242423 in words is "four hundred twenty million, two hundred forty-two thousand, four hundred twenty-three".