3986745 has 32 divisors (see below), whose sum is σ = 7468032. Its totient is φ = 1778112.

The previous prime is 3986737. The next prime is 3986747. The reversal of 3986745 is 5476893.

It is a happy number.

It is not a de Polignac number, because 3986745 - 2³ = 3986737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3986697 and 3986706.

It is not an unprimeable number, because it can be changed into a prime (3986747) 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 31 ways as a sum of consecutive naturals, for example, 4074 + ... + 4956.

It is an arithmetic number, because the mean of its divisors is an integer number (233376).

Almost surely, 2^3986745 is an apocalyptic number.

3986745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3986745 is a deficient number, since it is larger than the sum of its proper divisors (3481287).

3986745 is a wasteful number, since it uses less digits than its factorization.

3986745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 181440, while the sum is 42.

The square root of 3986745 is about 1996.6835002073. The cubic root of 3986745 is about 158.5645694854.

The spelling of 3986745 in words is "three million, nine hundred eighty-six thousand, seven hundred forty-five".