4139845 has 4 divisors (see below), whose sum is σ = 4967820. Its totient is φ = 3311872.

The previous prime is 4139831. The next prime is 4139873. The reversal of 4139845 is 5489314.

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 1256641 + 2883204 = 1121^2 + 1698^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139845 - 2¹³ = 4131653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4139845.

It is a congruent number.

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, 413980 + ... + 413989.

It is an arithmetic number, because the mean of its divisors is an integer number (1241955).

Almost surely, 2^4139845 is an apocalyptic number.

It is an amenable number.

4139845 is a deficient number, since it is larger than the sum of its proper divisors (827975).

4139845 is an equidigital number, since it uses as much as digits as its factorization.

4139845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827974.

The product of its digits is 17280, while the sum is 34.

The square root of 4139845 is about 2034.6609054091. The cubic root of 4139845 is about 160.5688734343.

The spelling of 4139845 in words is "four million, one hundred thirty-nine thousand, eight hundred forty-five".