1002021 has 8 divisors (see below), whose sum is σ = 1349664. Its totient is φ = 661200.

The previous prime is 1002017. The next prime is 1002049. The reversal of 1002021 is 1202001.

It is a happy number.

1002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1002021 - 2² = 1002017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351 + ... + 1956.

It is an arithmetic number, because the mean of its divisors is an integer number (168708).

2^1002021 is an apocalyptic number.

It is an amenable number.

1002021 is a deficient number, since it is larger than the sum of its proper divisors (347643).

1002021 is a wasteful number, since it uses less digits than its factorization.

1002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411.

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

The square root of 1002021 is about 1001.0099899601. The cubic root of 1002021 is about 100.0673213349.

Adding to 1002021 its reverse (1202001), we get a palindrome (2204022).

The spelling of 1002021 in words is "one million, two thousand, twenty-one".