3221649 has 12 divisors (see below), whose sum is σ = 4672512. Its totient is φ = 2139000.

The previous prime is 3221641. The next prime is 3221677. The reversal of 3221649 is 9461223.

It is not a de Polignac number, because 3221649 - 2³ = 3221641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3221641) 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, 2224 + ... + 3374.

It is an arithmetic number, because the mean of its divisors is an integer number (389376).

Almost surely, 2^3221649 is an apocalyptic number.

It is an amenable number.

3221649 is a deficient number, since it is larger than the sum of its proper divisors (1450863).

3221649 is a wasteful number, since it uses less digits than its factorization.

3221649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1465 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 3221649 is about 1794.8952615682. The cubic root of 3221649 is about 147.6928283360.

The spelling of 3221649 in words is "three million, two hundred twenty-one thousand, six hundred forty-nine".