1001002002 has 64 divisors (see below), whose sum is σ = 2688021504. Its totient is φ = 239999040.

The previous prime is 1001002001. The next prime is 1001002049. The reversal of 1001002002 is 2002001001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (1001002001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 77328 + ... + 89339.

It is an arithmetic number, because the mean of its divisors is an integer number (42000336).

Almost surely, 2^1001002002 is an apocalyptic number.

1001002002 is an abundant number, since it is smaller than the sum of its proper divisors (1687019502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001002002 is a wasteful number, since it uses less digits than its factorization.

1001002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166703.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 1001002002 is about 31638.6156776810. The cubic root of 1001002002 is about 1000.3338891723. Note that the first 3 decimals are identical.

Adding to 1001002002 its reverse (2002001001), we get a palindrome (3003003003).

The spelling of 1001002002 in words is "one billion, one million, two thousand, two".