3181985 has 8 divisors (see below), whose sum is σ = 3849216. Its totient is φ = 2525040.

The previous prime is 3181973. The next prime is 3181999. The reversal of 3181985 is 5891813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3181985 - 2⁶ = 3181921 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871 + ... + 3140.

It is an arithmetic number, because the mean of its divisors is an integer number (481152).

Almost surely, 2^3181985 is an apocalyptic number.

It is an amenable number.

3181985 is a deficient number, since it is larger than the sum of its proper divisors (667231).

3181985 is a wasteful number, since it uses less digits than its factorization.

3181985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143.

The product of its digits is 8640, while the sum is 35.

The square root of 3181985 is about 1783.8119295486. The cubic root of 3181985 is about 147.0842067714.

The spelling of 3181985 in words is "three million, one hundred eighty-one thousand, nine hundred eighty-five".