42271423 has 2 divisors, whose sum is σ = 42271424. Its totient is φ = 42271422.

The previous prime is 42271421. The next prime is 42271441. The reversal of 42271423 is 32417224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42271423 - 2¹ = 42271421 is a prime.

Together with 42271421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42271421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21135711 + 21135712.

It is an arithmetic number, because the mean of its divisors is an integer number (21135712).

Almost surely, 2^42271423 is an apocalyptic number.

42271423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42271423 is an equidigital number, since it uses as much as digits as its factorization.

42271423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 25.

The square root of 42271423 is about 6501.6477142337. The cubic root of 42271423 is about 348.3498458070.

Adding to 42271423 its reverse (32417224), we get a palindrome (74688647).

The spelling of 42271423 in words is "forty-two million, two hundred seventy-one thousand, four hundred twenty-three".