3139985 has 24 divisors (see below), whose sum is σ = 4177656. Its totient is φ = 2263040.

The previous prime is 3139979. The next prime is 3139991. The reversal of 3139985 is 5899313.

It is a Cunningham number, because it is equal to 1772²+1.

It is an interprime number because it is at equal distance from previous prime (3139979) and next prime (3139991).

It can be written as a sum of positive squares in 12 ways, for example, as 341056 + 2798929 = 584^2 + 1673^2 .

It is not a de Polignac number, because 3139985 - 2¹⁸ = 2877841 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 59219 + ... + 59271.

It is an arithmetic number, because the mean of its divisors is an integer number (174069).

Almost surely, 2^3139985 is an apocalyptic number.

It is an amenable number.

3139985 is a deficient number, since it is larger than the sum of its proper divisors (1037671).

3139985 is a wasteful number, since it uses less digits than its factorization.

3139985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 116 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 3139985 is about 1772.0002821670. Note that the first 3 decimals coincide. The cubic root of 3139985 is about 146.4342018741.

The spelling of 3139985 in words is "three million, one hundred thirty-nine thousand, nine hundred eighty-five".