3987265 has 16 divisors (see below), whose sum is σ = 5155920. Its totient is φ = 2949120.

The previous prime is 3987259. The next prime is 3987271. The reversal of 3987265 is 5627893.

It is an interprime number because it is at equal distance from previous prime (3987259) and next prime (3987271).

It can be written as a sum of positive squares in 8 ways, for example, as 304704 + 3682561 = 552^2 + 1919^2 .

It is not a de Polignac number, because 3987265 - 2¹¹ = 3985217 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4801 + ... + 5569.

It is an arithmetic number, because the mean of its divisors is an integer number (322245).

Almost surely, 2^3987265 is an apocalyptic number.

It is an amenable number.

3987265 is a deficient number, since it is larger than the sum of its proper divisors (1168655).

3987265 is a wasteful number, since it uses less digits than its factorization.

3987265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852.

The product of its digits is 90720, while the sum is 40.

The square root of 3987265 is about 1996.8137118920. The cubic root of 3987265 is about 158.5714631620.

The spelling of 3987265 in words is "three million, nine hundred eighty-seven thousand, two hundred sixty-five".