3682721 has 16 divisors (see below), whose sum is σ = 4414080. Its totient is φ = 3006720.

The previous prime is 3682709. The next prime is 3682729. The reversal of 3682721 is 1272863.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3682721 - 2¹⁰ = 3681697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3682729) 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, 15161 + ... + 15401.

It is an arithmetic number, because the mean of its divisors is an integer number (275880).

Almost surely, 2^3682721 is an apocalyptic number.

It is an amenable number.

3682721 is a deficient number, since it is larger than the sum of its proper divisors (731359).

3682721 is a wasteful number, since it uses less digits than its factorization.

3682721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344.

The product of its digits is 4032, while the sum is 29.

The square root of 3682721 is about 1919.0416879266. The cubic root of 3682721 is about 154.4268950303.

The spelling of 3682721 in words is "three million, six hundred eighty-two thousand, seven hundred twenty-one".