2565625 has 12 divisors (see below), whose sum is σ = 3210732. Its totient is φ = 2050000.

The previous prime is 2565611. The next prime is 2565643. The reversal of 2565625 is 5265652.

It can be written as a sum of positive squares in 6 ways, for example, as 2322576 + 243049 = 1524^2 + 493^2 .

It is not a de Polignac number, because 2565625 - 2⁵ = 2565593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2715 + ... + 3535.

It is an arithmetic number, because the mean of its divisors is an integer number (267561).

2^2565625 is an apocalyptic number.

2565625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565625 is a deficient number, since it is larger than the sum of its proper divisors (645107).

2565625 is an frugal number, since it uses more digits than its factorization.

2565625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 826 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 2565625 is about 1601.7568479641. The cubic root of 2565625 is about 136.8981963425.

It can be divided in two parts, 256 and 5625, that multiplied together give a square (1440000 = 1200²).

The spelling of 2565625 in words is "two million, five hundred sixty-five thousand, six hundred twenty-five".