2563605 has 24 divisors (see below), whose sum is σ = 4848480. Its totient is φ = 1242720.

The previous prime is 2563601. The next prime is 2563633. The reversal of 2563605 is 5063652.

2563605 is a `hidden beast` number, since 2 + 56 + 3 + 605 = 666.

2563605 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 2563605 - 2² = 2563601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563601) 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 23 ways as a sum of consecutive naturals, for example, 2095 + ... + 3084.

It is an arithmetic number, because the mean of its divisors is an integer number (202020).

2^2563605 is an apocalyptic number.

It is an amenable number.

2563605 is a deficient number, since it is larger than the sum of its proper divisors (2284875).

2563605 is a wasteful number, since it uses less digits than its factorization.

2563605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201 (or 5198 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 2563605 is about 1601.1261661718. The cubic root of 2563605 is about 136.8622587752.

The spelling of 2563605 in words is "two million, five hundred sixty-three thousand, six hundred five".