2505811 has 12 divisors (see below), whose sum is σ = 3180600. Its totient is φ = 1952160.

The previous prime is 2505809. The next prime is 2505829. The reversal of 2505811 is 1185052.

2505811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2505811 - 2¹ = 2505809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505311) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1786 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (265050).

2^2505811 is an apocalyptic number.

2505811 is a deficient number, since it is larger than the sum of its proper divisors (674789).

2505811 is a wasteful number, since it uses less digits than its factorization.

2505811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674 (or 4667 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2505811 is about 1582.9753630426. The cubic root of 2505811 is about 135.8259559980.

The spelling of 2505811 in words is "two million, five hundred five thousand, eight hundred eleven".