3420391 has 12 divisors (see below), whose sum is σ = 3810792. Its totient is φ = 3066336.

The previous prime is 3420371. The next prime is 3420401. The reversal of 3420391 is 1930243.

3420391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3420391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420341) 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 in 11 ways as a sum of consecutive naturals, for example, 5980 + ... + 6526.

It is an arithmetic number, because the mean of its divisors is an integer number (317566).

Almost surely, 2^3420391 is an apocalyptic number.

3420391 is a deficient number, since it is larger than the sum of its proper divisors (390401).

3420391 is a wasteful number, since it uses less digits than its factorization.

3420391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 3420391 is about 1849.4299121621. The cubic root of 3420391 is about 150.6694669079.

The spelling of 3420391 in words is "three million, four hundred twenty thousand, three hundred ninety-one".