3420645 has 16 divisors (see below), whose sum is σ = 5496000. Its totient is φ = 1816704.

The previous prime is 3420631. The next prime is 3420647. The reversal of 3420645 is 5460243.

3420645 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 3420645 - 2⁶ = 3420581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420647) 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 15 ways as a sum of consecutive naturals, for example, 6606 + ... + 7104.

It is an arithmetic number, because the mean of its divisors is an integer number (343500).

Almost surely, 2^3420645 is an apocalyptic number.

It is an amenable number.

3420645 is a deficient number, since it is larger than the sum of its proper divisors (2075355).

3420645 is a wasteful number, since it uses less digits than its factorization.

3420645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 3420645 is about 1849.4985806969. The cubic root of 3420645 is about 150.6731964130.

Adding to 3420645 its reverse (5460243), we get a palindrome (8880888).

The spelling of 3420645 in words is "three million, four hundred twenty thousand, six hundred forty-five".