42656423 has 2 divisors, whose sum is σ = 42656424. Its totient is φ = 42656422.

The previous prime is 42656407. The next prime is 42656431. The reversal of 42656423 is 32465624.

42656423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42656423 - 2⁴ = 42656407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42656423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42656023) 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, 21328211 + 21328212.

It is an arithmetic number, because the mean of its divisors is an integer number (21328212).

Almost surely, 2^42656423 is an apocalyptic number.

42656423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42656423 is an equidigital number, since it uses as much as digits as its factorization.

42656423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

The square root of 42656423 is about 6531.1884829639. The cubic root of 42656423 is about 349.4042190716.

The spelling of 42656423 in words is "forty-two million, six hundred fifty-six thousand, four hundred twenty-three".