2564503 has 4 divisors (see below), whose sum is σ = 2583360. Its totient is φ = 2545648.

The previous prime is 2564489. The next prime is 2564519. The reversal of 2564503 is 3054652.

2564503 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564503 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 5⁷ + 6⁴ + 4 + 5⁹ + 0 + 3¹² .

It is a Duffinian number.

2564503 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564593) 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 3 ways as a sum of consecutive naturals, for example, 9223 + ... + 9496.

It is an arithmetic number, because the mean of its divisors is an integer number (645840).

2^2564503 is an apocalyptic number.

2564503 is a deficient number, since it is larger than the sum of its proper divisors (18857).

2564503 is a wasteful number, since it uses less digits than its factorization.

2564503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18856.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2564503 is about 1601.4065692384. The cubic root of 2564503 is about 136.8782373108.

The spelling of 2564503 in words is "two million, five hundred sixty-four thousand, five hundred three".