1002011 has 4 divisors (see below), whose sum is σ = 1004112. Its totient is φ = 999912.

The previous prime is 1001989. The next prime is 1002017. The reversal of 1002011 is 1102001.

It is a happy number.

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 1002011 - 2⁶ = 1001947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001986 and 1002004.

It is not an unprimeable number, because it can be changed into a prime (1002017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (251028).

2^1002011 is an apocalyptic number.

1002011 is a deficient number, since it is larger than the sum of its proper divisors (2101).

1002011 is an equidigital number, since it uses as much as digits as its factorization.

1002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1002011 is about 1001.0049949925. The cubic root of 1002011 is about 100.0669884488.

Adding to 1002011 its reverse (1102001), we get a palindrome (2104012).

Multiplying 1002011 by its reverse (1102001), we get a palindrome (1104217124011).

The spelling of 1002011 in words is "one million, two thousand, eleven".