3607721 has 8 divisors (see below), whose sum is σ = 3926664. Its totient is φ = 3294720.

The previous prime is 3607697. The next prime is 3607727. The reversal of 3607721 is 1277063.

3607721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 144400 + 3463321 = 380^2 + 1861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3607721 - 2¹⁰ = 3606697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3607727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 2691.

It is an arithmetic number, because the mean of its divisors is an integer number (490833).

Almost surely, 2^3607721 is an apocalyptic number.

It is an amenable number.

3607721 is a deficient number, since it is larger than the sum of its proper divisors (318943).

3607721 is a wasteful number, since it uses less digits than its factorization.

3607721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2971.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 3607721 is about 1899.4001684742. The cubic root of 3607721 is about 153.3713762988.

The spelling of 3607721 in words is "three million, six hundred seven thousand, seven hundred twenty-one".