1003985 has 4 divisors (see below), whose sum is σ = 1204788. Its totient is φ = 803184.

The previous prime is 1003963. The next prime is 1004027. The reversal of 1003985 is 5893001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5893001 = 47 ⋅125383.

It can be written as a sum of positive squares in 2 ways, for example, as 508369 + 495616 = 713^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003985 - 2⁸ = 1003729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 100394 + ... + 100403.

It is an arithmetic number, because the mean of its divisors is an integer number (301197).

2^1003985 is an apocalyptic number.

It is an amenable number.

1003985 is a deficient number, since it is larger than the sum of its proper divisors (200803).

1003985 is an equidigital number, since it uses as much as digits as its factorization.

1003985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200802.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1003985 is about 1001.9905189172. The cubic root of 1003985 is about 100.1326572760.

Adding to 1003985 its reverse (5893001), we get a palindrome (6896986).

The spelling of 1003985 in words is "one million, three thousand, nine hundred eighty-five".