3220657 has 12 divisors (see below), whose sum is σ = 3628240. Its totient is φ = 2855160.

The previous prime is 3220639. The next prime is 3220661. The reversal of 3220657 is 7560223.

It is not a de Polignac number, because 3220657 - 2¹¹ = 3218609 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3220627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4894 + ... + 5512.

Almost surely, 2^3220657 is an apocalyptic number.

It is an amenable number.

3220657 is a deficient number, since it is larger than the sum of its proper divisors (407583).

3220657 is a wasteful number, since it uses less digits than its factorization.

3220657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 3220657 is about 1794.6189010484. The cubic root of 3220657 is about 147.6776677432.

The spelling of 3220657 in words is "three million, two hundred twenty thousand, six hundred fifty-seven".