42405527 has 2 divisors, whose sum is σ = 42405528. Its totient is φ = 42405526.

The previous prime is 42405523. The next prime is 42405619. The reversal of 42405527 is 72550424.

It is a happy number.

42405527 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42405527 - 2² = 42405523 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42405527.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42405523) 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, 21202763 + 21202764.

It is an arithmetic number, because the mean of its divisors is an integer number (21202764).

Almost surely, 2^42405527 is an apocalyptic number.

42405527 is a deficient number, since it is larger than the sum of its proper divisors (1).

42405527 is an equidigital number, since it uses as much as digits as its factorization.

42405527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 42405527 is about 6511.9526257491. The cubic root of 42405527 is about 348.7178311648.

The spelling of 42405527 in words is "forty-two million, four hundred five thousand, five hundred twenty-seven".