1001001004 has 24 divisors (see below), whose sum is σ = 1918758240. Its totient is φ = 454814976.

The previous prime is 1001000989. The next prime is 1001001011. The reversal of 1001001004 is 4001001001.

It is a happy number.

It is an unprimeable number.

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, 251832 + ... + 255775.

It is an arithmetic number, because the mean of its divisors is an integer number (79948260).

Almost surely, 2^1001001004 is an apocalyptic number.

It is an amenable number.

1001001004 is a deficient number, since it is larger than the sum of its proper divisors (917757236).

1001001004 is a wasteful number, since it uses less digits than its factorization.

1001001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507657 (or 507655 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1001001004 is about 31638.5999058113. The cubic root of 1001001004 is about 1000.3335567275. Note that the first 3 decimals are identical.

Adding to 1001001004 its reverse (4001001001), we get a palindrome (5002002005).

The spelling of 1001001004 in words is "one billion, one million, one thousand, four".