1042021 has 2 divisors, whose sum is σ = 1042022. Its totient is φ = 1042020.

The previous prime is 1042001. The next prime is 1042039. The reversal of 1042021 is 1202401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 148996 = 945^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042021 - 2⁷ = 1041893 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1041989 and 1042007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042001) 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 as a sum of consecutive naturals, namely, 521010 + 521011.

It is an arithmetic number, because the mean of its divisors is an integer number (521011).

2^1042021 is an apocalyptic number.

It is an amenable number.

1042021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042021 is an equidigital number, since it uses as much as digits as its factorization.

1042021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1042021 is about 1020.7942985734. The cubic root of 1042021 is about 101.3815259667.

Adding to 1042021 its reverse (1202401), we get a palindrome (2244422).

The spelling of 1042021 in words is "one million, forty-two thousand, twenty-one".