4138705 has 4 divisors (see below), whose sum is σ = 4966452. Its totient is φ = 3310960.

The previous prime is 4138703. The next prime is 4138711. The reversal of 4138705 is 5078314.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5078314 = 2 ⋅2539157.

It can be written as a sum of positive squares in 2 ways, for example, as 1183744 + 2954961 = 1088^2 + 1719^2 .

It is not a de Polignac number, because 4138705 - 2¹ = 4138703 is a prime.

It is a Duffinian number.

4138705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4138703) by changing a digit.

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, 413866 + ... + 413875.

It is an arithmetic number, because the mean of its divisors is an integer number (1241613).

Almost surely, 2^4138705 is an apocalyptic number.

It is an amenable number.

4138705 is a deficient number, since it is larger than the sum of its proper divisors (827747).

4138705 is an equidigital number, since it uses as much as digits as its factorization.

4138705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827746.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 4138705 is about 2034.3807411593. The cubic root of 4138705 is about 160.5541333236.

The spelling of 4138705 in words is "four million, one hundred thirty-eight thousand, seven hundred five".