1022021 has 16 divisors (see below), whose sum is σ = 1373568. Its totient is φ = 734400.

The previous prime is 1022017. The next prime is 1022033. The reversal of 1022021 is 1202201.

1022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1022021 - 2² = 1022017 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 (1022011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (85848).

2^1022021 is an apocalyptic number.

1022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022021 is a deficient number, since it is larger than the sum of its proper divisors (351547).

1022021 is a wasteful number, since it uses less digits than its factorization.

1022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1022021 is about 1010.9505428061. The cubic root of 1022021 is about 100.7287102484.

Adding to 1022021 its reverse (1202201), we get a palindrome (2224222).

The spelling of 1022021 in words is "one million, twenty-two thousand, twenty-one".