2581825 has 12 divisors (see below), whose sum is σ = 3255868. Its totient is φ = 2030400.

The previous prime is 2581771. The next prime is 2581829. The reversal of 2581825 is 5281852.

It can be written as a sum of positive squares in 6 ways, for example, as 602176 + 1979649 = 776^2 + 1407^2 .

It is not a de Polignac number, because 2581825 - 2⁷ = 2581697 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679 + ... + 2371.

2^2581825 is an apocalyptic number.

2581825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2581825 is a deficient number, since it is larger than the sum of its proper divisors (674043).

2581825 is a wasteful number, since it uses less digits than its factorization.

2581825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1759 counting only the distinct ones).

The product of its digits is 6400, while the sum is 31.

The square root of 2581825 is about 1606.8058376792. The cubic root of 2581825 is about 137.1857285260.

The spelling of 2581825 in words is "two million, five hundred eighty-one thousand, eight hundred twenty-five".