2604563 has 4 divisors (see below), whose sum is σ = 2804928. Its totient is φ = 2404200.

The previous prime is 2604559. The next prime is 2604583. The reversal of 2604563 is 3654062.

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

It is a cyclic number.

It is not a de Polignac number, because 2604563 - 2² = 2604559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2604523) by changing a digit.

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, 100163 + ... + 100188.

It is an arithmetic number, because the mean of its divisors is an integer number (701232).

2^2604563 is an apocalyptic number.

2604563 is a deficient number, since it is larger than the sum of its proper divisors (200365).

2604563 is a wasteful number, since it uses less digits than its factorization.

2604563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200364.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2604563 is about 1613.8658556398. The cubic root of 2604563 is about 137.5872812237.

The spelling of 2604563 in words is "two million, six hundred four thousand, five hundred sixty-three".