1042539 has 4 divisors (see below), whose sum is σ = 1390056. Its totient is φ = 695024.

The previous prime is 1042529. The next prime is 1042571. The reversal of 1042539 is 9352401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9352401 = 3 ⋅3117467.

It is a cyclic number.

It is not a de Polignac number, because 1042539 - 2⁴ = 1042523 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1042519) 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 in 3 ways as a sum of consecutive naturals, for example, 173754 + ... + 173759.

It is an arithmetic number, because the mean of its divisors is an integer number (347514).

2^1042539 is an apocalyptic number.

1042539 is a deficient number, since it is larger than the sum of its proper divisors (347517).

1042539 is an equidigital number, since it uses as much as digits as its factorization.

1042539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347516.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1042539 is about 1021.0479910367. The cubic root of 1042539 is about 101.3983224711.

The spelling of 1042539 in words is "one million, forty-two thousand, five hundred thirty-nine".