2578255 has 4 divisors (see below), whose sum is σ = 3093912. Its totient is φ = 2062600.

The previous prime is 2578253. The next prime is 2578259. The reversal of 2578255 is 5528752.

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

It is not a de Polignac number, because 2578255 - 2¹ = 2578253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2578255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578253) 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, 257821 + ... + 257830.

It is an arithmetic number, because the mean of its divisors is an integer number (773478).

2^2578255 is an apocalyptic number.

2578255 is a deficient number, since it is larger than the sum of its proper divisors (515657).

2578255 is an equidigital number, since it uses as much as digits as its factorization.

2578255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515656.

The product of its digits is 28000, while the sum is 34.

The square root of 2578255 is about 1605.6945537679. The cubic root of 2578255 is about 137.1224684989.

The spelling of 2578255 in words is "two million, five hundred seventy-eight thousand, two hundred fifty-five".