3986541 has 18 divisors (see below), whose sum is σ = 6237738. Its totient is φ = 2452320.

The previous prime is 3986539. The next prime is 3986581. The reversal of 3986541 is 1456893.

3986541 = 379² + 380² + ... + 404².

3986541 is a `hidden beast` number, since 39 + 86 + 541 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 125316 + 3861225 = 354^2 + 1965^2 .

It is not a de Polignac number, because 3986541 - 2¹ = 3986539 is a prime.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 3986496 and 3986505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986531) 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 17 ways as a sum of consecutive naturals, for example, 211 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (346541).

Almost surely, 2^3986541 is an apocalyptic number.

It is an amenable number.

3986541 is a deficient number, since it is larger than the sum of its proper divisors (2251197).

3986541 is a wasteful number, since it uses less digits than its factorization.

3986541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2637 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3986541 is about 1996.6324148426. The cubic root of 3986541 is about 158.5618648794.

The spelling of 3986541 in words is "three million, nine hundred eighty-six thousand, five hundred forty-one".