3220865 has 4 divisors (see below), whose sum is σ = 3865044. Its totient is φ = 2576688.

The previous prime is 3220859. The next prime is 3220873. The reversal of 3220865 is 5680223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 2879809 = 584^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220865 - 2⁴ = 3220849 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322082 + ... + 322091.

It is an arithmetic number, because the mean of its divisors is an integer number (966261).

Almost surely, 2^3220865 is an apocalyptic number.

It is an amenable number.

3220865 is a deficient number, since it is larger than the sum of its proper divisors (644179).

3220865 is an equidigital number, since it uses as much as digits as its factorization.

3220865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644178.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3220865 is about 1794.6768511350. The cubic root of 3220865 is about 147.6808468351.

The spelling of 3220865 in words is "three million, two hundred twenty thousand, eight hundred sixty-five".