3945555 has 12 divisors (see below), whose sum is σ = 6839040. Its totient is φ = 2104272.

The previous prime is 3945527. The next prime is 3945607. The reversal of 3945555 is 5555493.

3945555 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 3945555 - 2⁷ = 3945427 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 43795 + ... + 43884.

It is an arithmetic number, because the mean of its divisors is an integer number (569920).

Almost surely, 2^3945555 is an apocalyptic number.

3945555 is a deficient number, since it is larger than the sum of its proper divisors (2893485).

3945555 is a wasteful number, since it uses less digits than its factorization.

3945555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87690 (or 87687 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 3945555 is about 1986.3421155481. The cubic root of 3945555 is about 158.0165954902.

The spelling of 3945555 in words is "three million, nine hundred forty-five thousand, five hundred fifty-five".