2564505 has 12 divisors (see below), whose sum is σ = 4445220. Its totient is φ = 1367712.

The previous prime is 2564489. The next prime is 2564519. The reversal of 2564505 is 5054652.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 915849 = 1284^2 + 957^2 .

It is not a de Polignac number, because 2564505 - 2⁴ = 2564489 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28450 + ... + 28539.

It is an arithmetic number, because the mean of its divisors is an integer number (370435).

2^2564505 is an apocalyptic number.

It is an amenable number.

2564505 is a deficient number, since it is larger than the sum of its proper divisors (1880715).

2564505 is a wasteful number, since it uses less digits than its factorization.

2564505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57000 (or 56997 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2564505 is about 1601.4071936894. The cubic root of 2564505 is about 136.8782728935.

It can be divided in two parts, 256 and 4505, that added together give a square (4761 = 69²).

The spelling of 2564505 in words is "two million, five hundred sixty-four thousand, five hundred five".