3685321 has 4 divisors (see below), whose sum is σ = 3723412. Its totient is φ = 3647232.

The previous prime is 3685309. The next prime is 3685327. The reversal of 3685321 is 1235863.

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 657721 + 3027600 = 811^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 3685321 - 2⁵ = 3685289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3685321.

It is not an unprimeable number, because it can be changed into a prime (3685327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18900 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (930853).

Almost surely, 2^3685321 is an apocalyptic number.

It is an amenable number.

3685321 is a deficient number, since it is larger than the sum of its proper divisors (38091).

3685321 is an equidigital number, since it uses as much as digits as its factorization.

3685321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38090.

The product of its digits is 4320, while the sum is 28.

The square root of 3685321 is about 1919.7189898524. The cubic root of 3685321 is about 154.4632282628.

The spelling of 3685321 in words is "three million, six hundred eighty-five thousand, three hundred twenty-one".