3420305 has 16 divisors (see below), whose sum is σ = 4753920. Its totient is φ = 2313792.

The previous prime is 3420299. The next prime is 3420337. The reversal of 3420305 is 5030243.

It is a cyclic number.

It is not a de Polignac number, because 3420305 - 2¹⁴ = 3403921 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2147 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (297120).

Almost surely, 2^3420305 is an apocalyptic number.

3420305 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3420305 is a deficient number, since it is larger than the sum of its proper divisors (1333615).

3420305 is a wasteful number, since it uses less digits than its factorization.

3420305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 3420305 is about 1849.4066616080. The cubic root of 3420305 is about 150.6682041202.

Adding to 3420305 its reverse (5030243), we get a palindrome (8450548).

The spelling of 3420305 in words is "three million, four hundred twenty thousand, three hundred five".