2225785 has 4 divisors (see below), whose sum is σ = 2670948. Its totient is φ = 1780624.

The previous prime is 2225777. The next prime is 2225791. The reversal of 2225785 is 5875222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5875222 = 2 ⋅2937611.

It can be written as a sum of positive squares in 2 ways, for example, as 727609 + 1498176 = 853^2 + 1224^2 .

It is a cyclic number.

It is not a de Polignac number, because 2225785 - 2³ = 2225777 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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, 222574 + ... + 222583.

It is an arithmetic number, because the mean of its divisors is an integer number (667737).

2^2225785 is an apocalyptic number.

It is an amenable number.

2225785 is a deficient number, since it is larger than the sum of its proper divisors (445163).

2225785 is an equidigital number, since it uses as much as digits as its factorization.

2225785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445162.

The product of its digits is 11200, while the sum is 31.

The square root of 2225785 is about 1491.9064984107. The cubic root of 2225785 is about 130.5652898196.

The spelling of 2225785 in words is "two million, two hundred twenty-five thousand, seven hundred eighty-five".