3665215 has 8 divisors (see below), whose sum is σ = 4481568. Its totient is φ = 2876640.

The previous prime is 3665203. The next prime is 3665227. The reversal of 3665215 is 5125663.

It is an interprime number because it is at equal distance from previous prime (3665203) and next prime (3665227).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3665215 - 2⁷ = 3665087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6651 + ... + 7180.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^3665215 is an apocalyptic number.

3665215 is a deficient number, since it is larger than the sum of its proper divisors (816353).

3665215 is a wasteful number, since it uses less digits than its factorization.

3665215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13889.

The product of its digits is 5400, while the sum is 28.

The square root of 3665215 is about 1914.4751238917. The cubic root of 3665215 is about 154.1818142733.

The spelling of 3665215 in words is "three million, six hundred sixty-five thousand, two hundred fifteen".