2564803 has 8 divisors (see below), whose sum is σ = 2663648. Its totient is φ = 2467584.

The previous prime is 2564759. The next prime is 2564813. The reversal of 2564803 is 3084652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2564803 - 2²¹ = 467651 is a prime.

It is an Ulam number.

It is the 1602-nd Hogben number.

It is a Duffinian number.

2564803 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564813) by changing a digit.

It is a nontrivial repunit in base 1601.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3475 + ... + 4147.

It is an arithmetic number, because the mean of its divisors is an integer number (332956).

2^2564803 is an apocalyptic number.

2564803 is a deficient number, since it is larger than the sum of its proper divisors (98845).

2564803 is a wasteful number, since it uses less digits than its factorization.

2564803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2564803 is about 1601.5002341555. The cubic root of 2564803 is about 136.8835745204.

The spelling of 2564803 in words is "two million, five hundred sixty-four thousand, eight hundred three".