2605217 has 4 divisors (see below), whose sum is σ = 2617776. Its totient is φ = 2592660.

The previous prime is 2605201. The next prime is 2605231. The reversal of 2605217 is 7125062.

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.

It is a cyclic number.

It is not a de Polignac number, because 2605217 - 2⁴ = 2605201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2605192 and 2605201.

It is not an unprimeable number, because it can be changed into a prime (2605237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5963 + ... + 6384.

It is an arithmetic number, because the mean of its divisors is an integer number (654444).

2^2605217 is an apocalyptic number.

It is an amenable number.

2605217 is a deficient number, since it is larger than the sum of its proper divisors (12559).

2605217 is a wasteful number, since it uses less digits than its factorization.

2605217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12558.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2605217 is about 1614.0684619929. The cubic root of 2605217 is about 137.5987962138.

The spelling of 2605217 in words is "two million, six hundred five thousand, two hundred seventeen".