3421021 has 2 divisors, whose sum is σ = 3421022. Its totient is φ = 3421020.

The previous prime is 3421013. The next prime is 3421039. The reversal of 3421021 is 1201243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3024121 + 396900 = 1739^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421021 - 2³ = 3421013 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3420992 and 3421010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3421051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710510 + 1710511.

It is an arithmetic number, because the mean of its divisors is an integer number (1710511).

Almost surely, 2^3421021 is an apocalyptic number.

It is an amenable number.

3421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3421021 is an equidigital number, since it uses as much as digits as its factorization.

3421021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3421021 is about 1849.6002270761. The cubic root of 3421021 is about 150.6787169163.

Adding to 3421021 its reverse (1201243), we get a palindrome (4622264).

The spelling of 3421021 in words is "three million, four hundred twenty-one thousand, twenty-one".