2505785 has 4 divisors (see below), whose sum is σ = 3006948. Its totient is φ = 2004624.

The previous prime is 2505779. The next prime is 2505791. The reversal of 2505785 is 5875052.

It is a happy number.

2505785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2505779) and next prime (2505791).

It can be written as a sum of positive squares in 2 ways, for example, as 1075369 + 1430416 = 1037^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505785 - 2¹² = 2501689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250574 + ... + 250583.

It is an arithmetic number, because the mean of its divisors is an integer number (751737).

2^2505785 is an apocalyptic number.

It is an amenable number.

2505785 is a deficient number, since it is larger than the sum of its proper divisors (501163).

2505785 is an equidigital number, since it uses as much as digits as its factorization.

2505785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501162.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 2505785 is about 1582.9671506383. The cubic root of 2505785 is about 135.8254862250.

The spelling of 2505785 in words is "two million, five hundred five thousand, seven hundred eighty-five".