3321421 has 2 divisors, whose sum is σ = 3321422. Its totient is φ = 3321420.

The previous prime is 3321419. The next prime is 3321467. The reversal of 3321421 is 1241233.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2758921 + 562500 = 1661^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 3321421 - 2¹ = 3321419 is a prime.

It is a super-2 number, since 2×3321421² = 22063674918482, which contains 22 as substring.

Together with 3321419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3321395 and 3321404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3321401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660710 + 1660711.

It is an arithmetic number, because the mean of its divisors is an integer number (1660711).

Almost surely, 2^3321421 is an apocalyptic number.

It is an amenable number.

3321421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3321421 is an equidigital number, since it uses as much as digits as its factorization.

3321421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 3321421 is about 1822.4766116469. The cubic root of 3321421 is about 149.2019991970.

Adding to 3321421 its reverse (1241233), we get a palindrome (4562654).

The spelling of 3321421 in words is "three million, three hundred twenty-one thousand, four hundred twenty-one".