1004004005 has 8 divisors (see below), whose sum is σ = 1216065312. Its totient is φ = 795696208.

The previous prime is 1004003977. The next prime is 1004004007. The reversal of 1004004005 is 5004004001.

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

It is a cyclic number.

It is not a de Polignac number, because 1004004005 - 2²⁸ = 735568549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004004007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937787 + ... + 938856.

It is an arithmetic number, because the mean of its divisors is an integer number (152008164).

Almost surely, 2^1004004005 is an apocalyptic number.

It is an amenable number.

1004004005 is a deficient number, since it is larger than the sum of its proper divisors (212061307).

1004004005 is a wasteful number, since it uses less digits than its factorization.

1004004005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876755.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1004004005 is about 31686.0222337863. The cubic root of 1004004005 is about 1001.3328909457.

Adding to 1004004005 its reverse (5004004001), we get a palindrome (6008008006).

The spelling of 1004004005 in words is "one billion, four million, four thousand, five".