3721555 has 8 divisors (see below), whose sum is σ = 4728672. Its totient is φ = 2802048.

The previous prime is 3721537. The next prime is 3721559. The reversal of 3721555 is 5551273.

3721555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3721555 - 2¹⁵ = 3688787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721559) 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, 21807 + ... + 21976.

It is an arithmetic number, because the mean of its divisors is an integer number (591084).

Almost surely, 2^3721555 is an apocalyptic number.

3721555 is a deficient number, since it is larger than the sum of its proper divisors (1007117).

3721555 is a wasteful number, since it uses less digits than its factorization.

3721555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43805.

The product of its digits is 5250, while the sum is 28.

The square root of 3721555 is about 1929.1332250521. The cubic root of 3721555 is about 154.9678046208.

The spelling of 3721555 in words is "three million, seven hundred twenty-one thousand, five hundred fifty-five".