1004003243 has 4 divisors (see below), whose sum is σ = 1004284440. Its totient is φ = 1003722048.

The previous prime is 1004003219. The next prime is 1004003279. The reversal of 1004003243 is 3423004001.

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

It is a cyclic number.

It is not a de Polignac number, because 1004003243 - 2¹² = 1003999147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004003443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135173 + ... + 142406.

It is an arithmetic number, because the mean of its divisors is an integer number (251071110).

Almost surely, 2^1004003243 is an apocalyptic number.

1004003243 is a deficient number, since it is larger than the sum of its proper divisors (281197).

1004003243 is an equidigital number, since it uses as much as digits as its factorization.

1004003243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281196.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 1004003243 is about 31686.0102095546. The cubic root of 1004003243 is about 1001.3326376214.

Adding to 1004003243 its reverse (3423004001), we get a palindrome (4427007244).

The spelling of 1004003243 in words is "one billion, four million, three thousand, two hundred forty-three".