3866247 has 36 divisors (see below), whose sum is σ = 7095816. Its totient is φ = 2005920.

The previous prime is 3866243. The next prime is 3866263. The reversal of 3866247 is 7426683.

It is not a de Polignac number, because 3866247 - 2² = 3866243 is a prime.

3866247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4453 + ... + 5249.

It is an arithmetic number, because the mean of its divisors is an integer number (197106).

Almost surely, 2^3866247 is an apocalyptic number.

3866247 is a deficient number, since it is larger than the sum of its proper divisors (3229569).

3866247 is a wasteful number, since it uses less digits than its factorization.

3866247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 818 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 3866247 is about 1966.2774473609. The cubic root of 3866247 is about 156.9506789238.

The spelling of 3866247 in words is "three million, eight hundred sixty-six thousand, two hundred forty-seven".