3721105 has 4 divisors (see below), whose sum is σ = 4465332. Its totient is φ = 2976880.

The previous prime is 3721099. The next prime is 3721117. The reversal of 3721105 is 5011273.

3721105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1324801 + 2396304 = 1151^2 + 1548^2 .

It is not a de Polignac number, because 3721105 - 2³ = 3721097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 372106 + ... + 372115.

It is an arithmetic number, because the mean of its divisors is an integer number (1116333).

Almost surely, 2^3721105 is an apocalyptic number.

It is an amenable number.

3721105 is a deficient number, since it is larger than the sum of its proper divisors (744227).

3721105 is an equidigital number, since it uses as much as digits as its factorization.

3721105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744226.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 3721105 is about 1929.0165888348. The cubic root of 3721105 is about 154.9615582781.

Adding to 3721105 its reverse (5011273), we get a palindrome (8732378).

The spelling of 3721105 in words is "three million, seven hundred twenty-one thousand, one hundred five".