3981085 has 4 divisors (see below), whose sum is σ = 4777308. Its totient is φ = 3184864.

The previous prime is 3981071. The next prime is 3981097. The reversal of 3981085 is 5801893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1138489 + 2842596 = 1067^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 3981085 - 2⁷ = 3980957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3981085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398104 + ... + 398113.

It is an arithmetic number, because the mean of its divisors is an integer number (1194327).

Almost surely, 2^3981085 is an apocalyptic number.

It is an amenable number.

3981085 is a deficient number, since it is larger than the sum of its proper divisors (796223).

3981085 is an equidigital number, since it uses as much as digits as its factorization.

3981085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796222.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 3981085 is about 1995.2656464742. The cubic root of 3981085 is about 158.4894956666.

The spelling of 3981085 in words is "three million, nine hundred eighty-one thousand, eighty-five".