1020539 has 8 divisors (see below), whose sum is σ = 1137360. Its totient is φ = 909216.

The previous prime is 1020529. The next prime is 1020541. The reversal of 1020539 is 9350201.

1020539 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020539.

It is not an unprimeable number, because it can be changed into a prime (1020529) 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 7 ways as a sum of consecutive naturals, for example, 977 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (142170).

2^1020539 is an apocalyptic number.

1020539 is a deficient number, since it is larger than the sum of its proper divisors (116821).

1020539 is a wasteful number, since it uses less digits than its factorization.

1020539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1020539 is about 1010.2173033561. The cubic root of 1020539 is about 100.6799988677.

The spelling of 1020539 in words is "one million, twenty thousand, five hundred thirty-nine".