42388529 has 2 divisors, whose sum is σ = 42388530. Its totient is φ = 42388528.

The previous prime is 42388519. The next prime is 42388543. The reversal of 42388529 is 92588324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29593600 + 12794929 = 5440^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 42388529 - 2⁴ = 42388513 is a prime.

It is a Chen prime.

It is equal to p_2569847 and since 42388529 and 2569847 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42388519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194264 + 21194265.

It is an arithmetic number, because the mean of its divisors is an integer number (21194265).

Almost surely, 2^42388529 is an apocalyptic number.

It is an amenable number.

42388529 is a deficient number, since it is larger than the sum of its proper divisors (1).

42388529 is an equidigital number, since it uses as much as digits as its factorization.

42388529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 42388529 is about 6510.6473564462. The cubic root of 42388529 is about 348.6712311239.

The spelling of 42388529 in words is "forty-two million, three hundred eighty-eight thousand, five hundred twenty-nine".