1001002 has 4 divisors (see below), whose sum is σ = 1501506. Its totient is φ = 500500.

The previous prime is 1000999. The next prime is 1001003. The reversal of 1001002 is 2001001.

1001002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001001 = 281 ⋅7121.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 210681 = 889^2 + 459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1000982 and 1001000.

It is not an unprimeable number, because it can be changed into a prime (1001003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250249 + ... + 250252.

2^1001002 is an apocalyptic number.

1001002 is a deficient number, since it is larger than the sum of its proper divisors (500504).

1001002 is an equidigital number, since it uses as much as digits as its factorization.

1001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500503.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 1001002 is about 1000.5008745623. The cubic root of 1001002 is about 100.0333888506.

Adding to 1001002 its reverse (2001001), we get a palindrome (3002003).

Subtracting 1001002 from its reverse (2001001), we obtain a palindrome (999999).

Multiplying 1001002 by its reverse (2001001), we get a palindrome (2003006003002).

The spelling of 1001002 in words is "one million, one thousand, two".