3420905 has 16 divisors (see below), whose sum is σ = 4333824. Its totient is φ = 2587200.

The previous prime is 3420877. The next prime is 3420913. The reversal of 3420905 is 5090243.

3420905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3420905 - 2⁸ = 3420649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 17267 + ... + 17463.

It is an arithmetic number, because the mean of its divisors is an integer number (270864).

Almost surely, 2^3420905 is an apocalyptic number.

It is an amenable number.

3420905 is a deficient number, since it is larger than the sum of its proper divisors (912919).

3420905 is a wasteful number, since it uses less digits than its factorization.

3420905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3420905 is about 1849.5688686826. The cubic root of 3420905 is about 150.6770138255.

The spelling of 3420905 in words is "three million, four hundred twenty thousand, nine hundred five".