3939145 has 16 divisors (see below), whose sum is σ = 5436288. Its totient is φ = 2684160.

The previous prime is 3939071. The next prime is 3939149. The reversal of 3939145 is 5419393.

3939145 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 3939145 - 2⁹ = 3938633 is a prime.

It is a Duffinian number.

3939145 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939145.

It is not an unprimeable number, because it can be changed into a prime (3939149) 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 15 ways as a sum of consecutive naturals, for example, 8202 + ... + 8668.

It is an arithmetic number, because the mean of its divisors is an integer number (339768).

Almost surely, 2^3939145 is an apocalyptic number.

3939145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3939145 is a deficient number, since it is larger than the sum of its proper divisors (1497143).

3939145 is a wasteful number, since it uses less digits than its factorization.

3939145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its digits is 14580, while the sum is 34.

The square root of 3939145 is about 1984.7279410539. The cubic root of 3939145 is about 157.9309771687.

The spelling of 3939145 in words is "three million, nine hundred thirty-nine thousand, one hundred forty-five".