39042145 has 4 divisors (see below), whose sum is σ = 46850580. Its totient is φ = 31233712.

The previous prime is 39042139. The next prime is 39042161. The reversal of 39042145 is 54124093.

39042145 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 can be written as a sum of positive squares in 2 ways, for example, as 16451136 + 22591009 = 4056^2 + 4753^2 .

It is a cyclic number.

It is not a de Polignac number, because 39042145 - 2³ = 39042137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3904210 + ... + 3904219.

It is an arithmetic number, because the mean of its divisors is an integer number (11712645).

Almost surely, 2^39042145 is an apocalyptic number.

It is an amenable number.

39042145 is a deficient number, since it is larger than the sum of its proper divisors (7808435).

39042145 is an equidigital number, since it uses as much as digits as its factorization.

39042145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7808434.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 39042145 is about 6248.3713878098. The cubic root of 39042145 is about 339.2432563993.

The spelling of 39042145 in words is "thirty-nine million, forty-two thousand, one hundred forty-five".