3420409 has 2 divisors, whose sum is σ = 3420410. Its totient is φ = 3420408.

The previous prime is 3420401. The next prime is 3420421. The reversal of 3420409 is 9040243.

3420409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3404025 + 16384 = 1845^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420409 - 2³ = 3420401 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3420409.

It is not a weakly prime, because it can be changed into another prime (3420401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710204 + 1710205.

It is an arithmetic number, because the mean of its divisors is an integer number (1710205).

Almost surely, 2^3420409 is an apocalyptic number.

It is an amenable number.

3420409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3420409 is an equidigital number, since it uses as much as digits as its factorization.

3420409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 3420409 is about 1849.4347785202. The cubic root of 3420409 is about 150.6697312096.

The spelling of 3420409 in words is "three million, four hundred twenty thousand, four hundred nine".