3721641 has 16 divisors (see below), whose sum is σ = 6187008. Its totient is φ = 1933200.

The previous prime is 3721631. The next prime is 3721673. The reversal of 3721641 is 1461273.

3721641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3721641 - 2⁹ = 3721129 is a prime.

It is a super-2 number, since 2×3721641² = 27701223465762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3721621) 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 15 ways as a sum of consecutive naturals, for example, 7825 + ... + 8286.

It is an arithmetic number, because the mean of its divisors is an integer number (386688).

Almost surely, 2^3721641 is an apocalyptic number.

It is an amenable number.

3721641 is a deficient number, since it is larger than the sum of its proper divisors (2465367).

3721641 is a wasteful number, since it uses less digits than its factorization.

3721641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16132.

The product of its digits is 1008, while the sum is 24.

The square root of 3721641 is about 1929.1555147266. The cubic root of 3721641 is about 154.9689983089.

The spelling of 3721641 in words is "three million, seven hundred twenty-one thousand, six hundred forty-one".