2564245 has 4 divisors (see below), whose sum is σ = 3077100. Its totient is φ = 2051392.

The previous prime is 2564207. The next prime is 2564249. The reversal of 2564245 is 5424652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 695556 + 1868689 = 834^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564245 - 2⁷ = 2564117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256420 + ... + 256429.

It is an arithmetic number, because the mean of its divisors is an integer number (769275).

2^2564245 is an apocalyptic number.

It is an amenable number.

2564245 is a deficient number, since it is larger than the sum of its proper divisors (512855).

2564245 is an equidigital number, since it uses as much as digits as its factorization.

2564245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512854.

The product of its digits is 9600, while the sum is 28.

The square root of 2564245 is about 1601.3260130280. The cubic root of 2564245 is about 136.8736469776.

Adding to 2564245 its reverse (5424652), we get a palindrome (7988897).

It can be divided in two parts, 2564 and 245, that added together give a square (2809 = 53²).

The spelling of 2564245 in words is "two million, five hundred sixty-four thousand, two hundred forty-five".