3945285 has 24 divisors (see below), whose sum is σ = 6937944. Its totient is φ = 2073600.

The previous prime is 3945233. The next prime is 3945287. The reversal of 3945285 is 5825493.

3945285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1089 + 3944196 = 33^2 + 1986^2 .

It is not a de Polignac number, because 3945285 - 2⁷ = 3945157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945287) 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 23 ways as a sum of consecutive naturals, for example, 2685 + ... + 3885.

It is an arithmetic number, because the mean of its divisors is an integer number (289081).

Almost surely, 2^3945285 is an apocalyptic number.

It is an amenable number.

3945285 is a deficient number, since it is larger than the sum of its proper divisors (2992659).

3945285 is a wasteful number, since it uses less digits than its factorization.

3945285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1282 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 3945285 is about 1986.2741502622. The cubic root of 3945285 is about 158.0129909737.

The spelling of 3945285 in words is "three million, nine hundred forty-five thousand, two hundred eighty-five".