2578265 has 4 divisors (see below), whose sum is σ = 3093924. Its totient is φ = 2062608.

The previous prime is 2578259. The next prime is 2578267. The reversal of 2578265 is 5628752.

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 458329 + 2119936 = 677^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578265 - 2⁴ = 2578249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578267) 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, 257822 + ... + 257831.

It is an arithmetic number, because the mean of its divisors is an integer number (773481).

2^2578265 is an apocalyptic number.

It is an amenable number.

2578265 is a deficient number, since it is larger than the sum of its proper divisors (515659).

2578265 is an equidigital number, since it uses as much as digits as its factorization.

2578265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515658.

The product of its digits is 33600, while the sum is 35.

The square root of 2578265 is about 1605.6976676822. The cubic root of 2578265 is about 137.1226457794.

The spelling of 2578265 in words is "two million, five hundred seventy-eight thousand, two hundred sixty-five".