42003539 has 2 divisors, whose sum is σ = 42003540. Its totient is φ = 42003538.

The previous prime is 42003491. The next prime is 42003551. The reversal of 42003539 is 93530024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42003539 - 2¹⁶ = 41938003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42003139) 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, 21001769 + 21001770.

It is an arithmetic number, because the mean of its divisors is an integer number (21001770).

Almost surely, 2^42003539 is an apocalyptic number.

42003539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42003539 is an equidigital number, since it uses as much as digits as its factorization.

42003539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 42003539 is about 6481.0137324341. The cubic root of 42003539 is about 347.6124274353.

The spelling of 42003539 in words is "forty-two million, three thousand, five hundred thirty-nine".