3216641 has 4 divisors (see below), whose sum is σ = 3225300. Its totient is φ = 3207984.

The previous prime is 3216637. The next prime is 3216649. The reversal of 3216641 is 1466123.

It is a happy number.

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 1960000 + 1256641 = 1400^2 + 1121^2 .

It is a cyclic number.

It is not a de Polignac number, because 3216641 - 2² = 3216637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3746 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (806325).

Almost surely, 2^3216641 is an apocalyptic number.

It is an amenable number.

3216641 is a deficient number, since it is larger than the sum of its proper divisors (8659).

3216641 is an equidigital number, since it uses as much as digits as its factorization.

3216641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8658.

The product of its digits is 864, while the sum is 23.

The square root of 3216641 is about 1793.4996515193. The cubic root of 3216641 is about 147.6162599626.

The spelling of 3216641 in words is "three million, two hundred sixteen thousand, six hundred forty-one".