2778025 has 6 divisors (see below), whose sum is σ = 3444782. Its totient is φ = 2222400.

The previous prime is 2778023. The next prime is 2778049. The reversal of 2778025 is 5208772.

2778025 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 3 ways, for example, as 205209 + 2572816 = 453^2 + 1604^2 .

It is not a de Polignac number, because 2778025 - 2¹ = 2778023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778023) 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 5 ways as a sum of consecutive naturals, for example, 55536 + ... + 55585.

2^2778025 is an apocalyptic number.

2778025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2778025 is a deficient number, since it is larger than the sum of its proper divisors (666757).

2778025 is a wasteful number, since it uses less digits than its factorization.

2778025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111131 (or 111126 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2778025 is about 1666.7408316832. The cubic root of 2778025 is about 140.5762810659.

The spelling of 2778025 in words is "two million, seven hundred seventy-eight thousand, twenty-five".