2785217 has 4 divisors (see below), whose sum is σ = 2788656. Its totient is φ = 2781780.

The previous prime is 2785207. The next prime is 2785219. The reversal of 2785217 is 7125872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2785217 - 2⁴ = 2785201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2785219) 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 3 ways as a sum of consecutive naturals, for example, 242 + ... + 2372.

It is an arithmetic number, because the mean of its divisors is an integer number (697164).

2^2785217 is an apocalyptic number.

It is an amenable number.

2785217 is a deficient number, since it is larger than the sum of its proper divisors (3439).

2785217 is a wasteful number, since it uses less digits than its factorization.

2785217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438.

The product of its digits is 7840, while the sum is 32.

The square root of 2785217 is about 1668.8969410961. The cubic root of 2785217 is about 140.6974886851.

The spelling of 2785217 in words is "two million, seven hundred eighty-five thousand, two hundred seventeen".