3987085 has 4 divisors (see below), whose sum is σ = 4784508. Its totient is φ = 3189664.

The previous prime is 3987079. The next prime is 3987107. The reversal of 3987085 is 5807893.

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 2172676 + 1814409 = 1474^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 3987085 - 2³ = 3987077 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 398704 + ... + 398713.

It is an arithmetic number, because the mean of its divisors is an integer number (1196127).

Almost surely, 2^3987085 is an apocalyptic number.

It is an amenable number.

3987085 is a deficient number, since it is larger than the sum of its proper divisors (797423).

3987085 is an equidigital number, since it uses as much as digits as its factorization.

3987085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797422.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3987085 is about 1996.7686395775. The cubic root of 3987085 is about 158.5690769572.

The spelling of 3987085 in words is "three million, nine hundred eighty-seven thousand, eighty-five".