3218945 has 8 divisors (see below), whose sum is σ = 3903144. Its totient is φ = 2548224.

The previous prime is 3218939. The next prime is 3218953. The reversal of 3218945 is 5498123.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 3214849 = 64^2 + 1793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3218945 - 2²⁰ = 2170369 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (487893).

Almost surely, 2^3218945 is an apocalyptic number.

It is an amenable number.

3218945 is a deficient number, since it is larger than the sum of its proper divisors (684199).

3218945 is an equidigital number, since it uses as much as digits as its factorization.

3218945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739.

The product of its digits is 8640, while the sum is 32.

The square root of 3218945 is about 1794.1418561530. The cubic root of 3218945 is about 147.6514961703.

The spelling of 3218945 in words is "three million, two hundred eighteen thousand, nine hundred forty-five".