3887145 has 12 divisors (see below), whose sum is σ = 6737796. Its totient is φ = 2073120.

The previous prime is 3887129. The next prime is 3887167. The reversal of 3887145 is 5417883.

It can be written as a sum of positive squares in 2 ways, for example, as 1490841 + 2396304 = 1221^2 + 1548^2 .

It is not a de Polignac number, because 3887145 - 2⁴ = 3887129 is a prime.

3887145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43146 + ... + 43235.

It is an arithmetic number, because the mean of its divisors is an integer number (561483).

Almost surely, 2^3887145 is an apocalyptic number.

It is an amenable number.

3887145 is a deficient number, since it is larger than the sum of its proper divisors (2850651).

3887145 is a wasteful number, since it uses less digits than its factorization.

3887145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86392 (or 86389 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 3887145 is about 1971.5843882523. The cubic root of 3887145 is about 157.2329563986.

The spelling of 3887145 in words is "three million, eight hundred eighty-seven thousand, one hundred forty-five".