42063421 has 2 divisors, whose sum is σ = 42063422. Its totient is φ = 42063420.

The previous prime is 42063391. The next prime is 42063433. The reversal of 42063421 is 12436024.

It is a happy number.

42063421 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 can be written as a sum of positive squares in only one way, i.e., 38007225 + 4056196 = 6165^2 + 2014^2 .

It is a cyclic number.

It is not a de Polignac number, because 42063421 - 2¹⁹ = 41539133 is a prime.

It is equal to p_2551216 and since 42063421 and 2551216 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 42063392 and 42063401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42063451) 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, 21031710 + 21031711.

It is an arithmetic number, because the mean of its divisors is an integer number (21031711).

Almost surely, 2^42063421 is an apocalyptic number.

It is an amenable number.

42063421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42063421 is an equidigital number, since it uses as much as digits as its factorization.

42063421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42063421 is about 6485.6318890298. The cubic root of 42063421 is about 347.7775392630. Note that the first 3 decimals are identical.

Adding to 42063421 its reverse (12436024), we get a palindrome (54499445).

The spelling of 42063421 in words is "forty-two million, sixty-three thousand, four hundred twenty-one".