3665247 has 4 divisors (see below), whose sum is σ = 4887000. Its totient is φ = 2443496.

The previous prime is 3665239. The next prime is 3665261. The reversal of 3665247 is 7425663.

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

It is a cyclic number.

It is not a de Polignac number, because 3665247 - 2³ = 3665239 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665227) 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, 610872 + ... + 610877.

It is an arithmetic number, because the mean of its divisors is an integer number (1221750).

Almost surely, 2^3665247 is an apocalyptic number.

3665247 is a deficient number, since it is larger than the sum of its proper divisors (1221753).

3665247 is a wasteful number, since it uses less digits than its factorization.

3665247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221752.

The product of its digits is 30240, while the sum is 33.

The square root of 3665247 is about 1914.4834812555. The cubic root of 3665247 is about 154.1822629786.

The spelling of 3665247 in words is "three million, six hundred sixty-five thousand, two hundred forty-seven".