1003539 has 4 divisors (see below), whose sum is σ = 1338056. Its totient is φ = 669024.

The previous prime is 1003517. The next prime is 1003543. The reversal of 1003539 is 9353001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1003539 - 2⁵ = 1003507 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1003549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167254 + ... + 167259.

It is an arithmetic number, because the mean of its divisors is an integer number (334514).

2^1003539 is an apocalyptic number.

1003539 is a deficient number, since it is larger than the sum of its proper divisors (334517).

1003539 is an equidigital number, since it uses as much as digits as its factorization.

1003539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334516.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 1003539 is about 1001.7679371990. The cubic root of 1003539 is about 100.1178277783.

The spelling of 1003539 in words is "one million, three thousand, five hundred thirty-nine".