3987015 has 16 divisors (see below), whose sum is σ = 6423648. Its totient is φ = 2111616.

The previous prime is 3987013. The next prime is 3987019. The reversal of 3987015 is 5107893.

It is not a de Polignac number, because 3987015 - 2¹ = 3987013 is a prime.

It is a super-2 number, since 2×3987015² = 31792577220450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1509 + ... + 3201.

It is an arithmetic number, because the mean of its divisors is an integer number (401478).

Almost surely, 2^3987015 is an apocalyptic number.

3987015 is a deficient number, since it is larger than the sum of its proper divisors (2436633).

3987015 is a wasteful number, since it uses less digits than its factorization.

3987015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 3987015 is about 1996.7511111804. The cubic root of 3987015 is about 158.5681489692.

The spelling of 3987015 in words is "three million, nine hundred eighty-seven thousand, fifteen".