3705139 has 4 divisors (see below), whose sum is σ = 3866256. Its totient is φ = 3544024.

The previous prime is 3705137. The next prime is 3705161. The reversal of 3705139 is 9315073.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9315073 = 19 ⋅490267.

It is not a de Polignac number, because 3705139 - 2¹ = 3705137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3705137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80524 + ... + 80569.

It is an arithmetic number, because the mean of its divisors is an integer number (966564).

Almost surely, 2^3705139 is an apocalyptic number.

3705139 is a deficient number, since it is larger than the sum of its proper divisors (161117).

3705139 is a wasteful number, since it uses less digits than its factorization.

3705139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161116.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 3705139 is about 1924.8737620945. The cubic root of 3705139 is about 154.7396113717.

It can be divided in two parts, 3705 and 139, that added together give a square (3844 = 62²).

The spelling of 3705139 in words is "three million, seven hundred five thousand, one hundred thirty-nine".