3866547 has 4 divisors (see below), whose sum is σ = 5155400. Its totient is φ = 2577696.

The previous prime is 3866543. The next prime is 3866581. The reversal of 3866547 is 7456683.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3866547 - 2² = 3866543 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3866543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644422 + ... + 644427.

It is an arithmetic number, because the mean of its divisors is an integer number (1288850).

Almost surely, 2^3866547 is an apocalyptic number.

3866547 is a deficient number, since it is larger than the sum of its proper divisors (1288853).

3866547 is a wasteful number, since it uses less digits than its factorization.

3866547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288852.

The product of its digits is 120960, while the sum is 39.

The square root of 3866547 is about 1966.3537321652. The cubic root of 3866547 is about 156.9547383287.

The spelling of 3866547 in words is "three million, eight hundred sixty-six thousand, five hundred forty-seven".