3220145 has 4 divisors (see below), whose sum is σ = 3864180. Its totient is φ = 2576112.

The previous prime is 3220127. The next prime is 3220153. The reversal of 3220145 is 5410223.

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 2283121 + 937024 = 1511^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220145 - 2⁶ = 3220081 is a prime.

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, 322010 + ... + 322019.

It is an arithmetic number, because the mean of its divisors is an integer number (966045).

Almost surely, 2^3220145 is an apocalyptic number.

It is an amenable number.

3220145 is a deficient number, since it is larger than the sum of its proper divisors (644035).

3220145 is an equidigital number, since it uses as much as digits as its factorization.

3220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644034.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3220145 is about 1794.4762467082. The cubic root of 3220145 is about 147.6698417030.

Adding to 3220145 its reverse (5410223), we get a palindrome (8630368).

The spelling of 3220145 in words is "three million, two hundred twenty thousand, one hundred forty-five".