3687321 has 16 divisors (see below), whose sum is σ = 5549760. Its totient is φ = 2157120.

The previous prime is 3687319. The next prime is 3687373. The reversal of 3687321 is 1237863.

It is not a de Polignac number, because 3687321 - 2¹ = 3687319 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3687301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 970 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (346860).

Almost surely, 2^3687321 is an apocalyptic number.

It is an amenable number.

3687321 is a deficient number, since it is larger than the sum of its proper divisors (1862439).

3687321 is a wasteful number, since it uses less digits than its factorization.

3687321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896.

The product of its digits is 6048, while the sum is 30.

The square root of 3687321 is about 1920.2398287714. The cubic root of 3687321 is about 154.4911652765.

The spelling of 3687321 in words is "three million, six hundred eighty-seven thousand, three hundred twenty-one".