2781825 has 24 divisors (see below), whose sum is σ = 4761600. Its totient is φ = 1431360.

The previous prime is 2781817. The next prime is 2781853. The reversal of 2781825 is 5281872.

It is not a de Polignac number, because 2781825 - 2³ = 2781817 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1536 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (198400).

2^2781825 is an apocalyptic number.

2781825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2781825 is a deficient number, since it is larger than the sum of its proper divisors (1979775).

2781825 is a wasteful number, since it uses less digits than its factorization.

2781825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 1316 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 2781825 is about 1667.8803913950. The cubic root of 2781825 is about 140.6403489419.

The spelling of 2781825 in words is "two million, seven hundred eighty-one thousand, eight hundred twenty-five".