3216545 has 8 divisors (see below), whose sum is σ = 3894696. Its totient is φ = 2550016.

The previous prime is 3216523. The next prime is 3216559. The reversal of 3216545 is 5456123.

It can be written as a sum of positive squares in 4 ways, for example, as 150544 + 3066001 = 388^2 + 1751^2 .

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 3216545 - 2⁸ = 3216289 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, 2282 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (486837).

Almost surely, 2^3216545 is an apocalyptic number.

It is an amenable number.

3216545 is a deficient number, since it is larger than the sum of its proper divisors (678151).

3216545 is a wasteful number, since it uses less digits than its factorization.

3216545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811.

The product of its digits is 3600, while the sum is 26.

The square root of 3216545 is about 1793.4728880025. The cubic root of 3216545 is about 147.6147914221.

The spelling of 3216545 in words is "three million, two hundred sixteen thousand, five hundred forty-five".