3420865 has 16 divisors (see below), whose sum is σ = 4802688. Its totient is φ = 2290176.

The previous prime is 3420839. The next prime is 3420871. The reversal of 3420865 is 5680243.

It is not a de Polignac number, because 3420865 - 2¹⁵ = 3388097 is a prime.

It is a Duffinian number.

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, 369 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (300168).

Almost surely, 2^3420865 is an apocalyptic number.

3420865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3420865 is a deficient number, since it is larger than the sum of its proper divisors (1381823).

3420865 is a wasteful number, since it uses less digits than its factorization.

3420865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 3420865 is about 1849.5580553202. The cubic root of 3420865 is about 150.6764265438.

The spelling of 3420865 in words is "three million, four hundred twenty thousand, eight hundred sixty-five".