2820725 has 12 divisors (see below), whose sum is σ = 3704004. Its totient is φ = 2123520.

The previous prime is 2820709. The next prime is 2820733. The reversal of 2820725 is 5270282.

2820725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 289444 + 2531281 = 538^2 + 1591^2 .

It is not a de Polignac number, because 2820725 - 2⁴ = 2820709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2820694 and 2820703.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2894 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (308667).

2^2820725 is an apocalyptic number.

2820725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2820725 is a deficient number, since it is larger than the sum of its proper divisors (883279).

2820725 is a wasteful number, since it uses less digits than its factorization.

2820725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6664 (or 6659 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 2820725 is about 1679.5014141107. The cubic root of 2820725 is about 141.2928707941.

It can be divided in two parts, 282072 and 5, that multiplied together give a triangular number (1410360 = T₁₆₇₉).

The spelling of 2820725 in words is "two million, eight hundred twenty thousand, seven hundred twenty-five".