42001529 has 2 divisors, whose sum is σ = 42001530. Its totient is φ = 42001528.

The previous prime is 42001517. The next prime is 42001573. The reversal of 42001529 is 92510024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 11916304 = 5485^2 + 3452^2 .

It is a cyclic number.

It is not a de Polignac number, because 42001529 - 2¹² = 41997433 is a prime.

It is not a weakly prime, because it can be changed into another prime (42001579) 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, 21000764 + 21000765.

It is an arithmetic number, because the mean of its divisors is an integer number (21000765).

Almost surely, 2^42001529 is an apocalyptic number.

It is an amenable number.

42001529 is a deficient number, since it is larger than the sum of its proper divisors (1).

42001529 is an equidigital number, since it uses as much as digits as its factorization.

42001529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 42001529 is about 6480.8586622453. The cubic root of 42001529 is about 347.6068825682.

The spelling of 42001529 in words is "forty-two million, one thousand, five hundred twenty-nine".