3101985 has 24 divisors (see below), whose sum is σ = 5564520. Its totient is φ = 1596672.

The previous prime is 3101971. The next prime is 3101999. The reversal of 3101985 is 5891013.

3101985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3101971) and next prime (3101999).

It can be written as a sum of positive squares in 4 ways, for example, as 239121 + 2862864 = 489^2 + 1692^2 .

It is not a de Polignac number, because 3101985 - 2⁸ = 3101729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (231855).

Almost surely, 2^3101985 is an apocalyptic number.

It is an amenable number.

3101985 is a deficient number, since it is larger than the sum of its proper divisors (2462535).

3101985 is a wasteful number, since it uses less digits than its factorization.

3101985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417 (or 2414 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 3101985 is about 1761.2452980775. The cubic root of 3101985 is about 145.8410887486.

Adding to 3101985 its reverse (5891013), we get a palindrome (8992998).

The spelling of 3101985 in words is "three million, one hundred one thousand, nine hundred eighty-five".