2578725 has 36 divisors (see below), whose sum is σ = 4711876. Its totient is φ = 1347840.

The previous prime is 2578721. The next prime is 2578729. The reversal of 2578725 is 5278752.

2578725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2578721) and next prime (2578729).

It can be written as a sum of positive squares in 6 ways, for example, as 116964 + 2461761 = 342^2 + 1569^2 .

It is not a de Polignac number, because 2578725 - 2² = 2578721 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 2578725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16347 + ... + 16503.

2^2578725 is an apocalyptic number.

2578725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578725 is a deficient number, since it is larger than the sum of its proper divisors (2133151).

2578725 is a wasteful number, since it uses less digits than its factorization.

2578725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 238 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2578725 is about 1605.8409012103. The cubic root of 2578725 is about 137.1308001863.

The spelling of 2578725 in words is "two million, five hundred seventy-eight thousand, seven hundred twenty-five".