3945155 has 4 divisors (see below), whose sum is σ = 4734192. Its totient is φ = 3156120.

The previous prime is 3945127. The next prime is 3945157. The reversal of 3945155 is 5515493.

3945155 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 is not a de Polignac number, because 3945155 - 2¹⁰ = 3944131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3945157) 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 3 ways as a sum of consecutive naturals, for example, 394511 + ... + 394520.

It is an arithmetic number, because the mean of its divisors is an integer number (1183548).

Almost surely, 2^3945155 is an apocalyptic number.

3945155 is a deficient number, since it is larger than the sum of its proper divisors (789037).

3945155 is an equidigital number, since it uses as much as digits as its factorization.

3945155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789036.

The product of its digits is 13500, while the sum is 32.

The square root of 3945155 is about 1986.2414254063. The cubic root of 3945155 is about 158.0112554071.

The spelling of 3945155 in words is "three million, nine hundred forty-five thousand, one hundred fifty-five".