3340021 has 2 divisors, whose sum is σ = 3340022. Its totient is φ = 3340020.

The previous prime is 3340009. The next prime is 3340039. The reversal of 3340021 is 1200433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3294225 + 45796 = 1815^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 3340021 - 2⁵ = 3339989 is a prime.

It is a super-2 number, since 2×3340021² = 22311480560882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3339983 and 3340010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3340061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670010 + 1670011.

It is an arithmetic number, because the mean of its divisors is an integer number (1670011).

Almost surely, 2^3340021 is an apocalyptic number.

It is an amenable number.

3340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3340021 is an equidigital number, since it uses as much as digits as its factorization.

3340021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3340021 is about 1827.5724335851. The cubic root of 3340021 is about 149.4799919533.

Adding to 3340021 its reverse (1200433), we get a palindrome (4540454).

The spelling of 3340021 in words is "three million, three hundred forty thousand, twenty-one".