3566321 has 4 divisors (see below), whose sum is σ = 3890544. Its totient is φ = 3242100.

The previous prime is 3566309. The next prime is 3566327. The reversal of 3566321 is 1236653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3566321 - 2⁶ = 3566257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3566327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162095 + ... + 162116.

It is an arithmetic number, because the mean of its divisors is an integer number (972636).

Almost surely, 2^3566321 is an apocalyptic number.

It is an amenable number.

3566321 is a deficient number, since it is larger than the sum of its proper divisors (324223).

3566321 is a wasteful number, since it uses less digits than its factorization.

3566321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324222.

The product of its digits is 3240, while the sum is 26.

The square root of 3566321 is about 1888.4705451767. The cubic root of 3566321 is about 152.7824524361.

The spelling of 3566321 in words is "three million, five hundred sixty-six thousand, three hundred twenty-one".