42528539 has 2 divisors, whose sum is σ = 42528540. Its totient is φ = 42528538.

The previous prime is 42528533. The next prime is 42528569. The reversal of 42528539 is 93582524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42528539 - 2⁴ = 42528523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42528533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21264269 + 21264270.

It is an arithmetic number, because the mean of its divisors is an integer number (21264270).

Almost surely, 2^42528539 is an apocalyptic number.

42528539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42528539 is an equidigital number, since it uses as much as digits as its factorization.

42528539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 42528539 is about 6521.3908792527. The cubic root of 42528539 is about 349.0546981479.

The spelling of 42528539 in words is "forty-two million, five hundred twenty-eight thousand, five hundred thirty-nine".