2778425 has 24 divisors (see below), whose sum is σ = 3791424. Its totient is φ = 2007360.

The previous prime is 2778421. The next prime is 2778439. The reversal of 2778425 is 5248772.

2778425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2778425 - 2² = 2778421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778421) 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 23 ways as a sum of consecutive naturals, for example, 26924 + ... + 27026.

It is an arithmetic number, because the mean of its divisors is an integer number (157976).

2^2778425 is an apocalyptic number.

2778425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2778425 is a deficient number, since it is larger than the sum of its proper divisors (1012999).

2778425 is a wasteful number, since it uses less digits than its factorization.

2778425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 204 counting only the distinct ones).

The product of its digits is 31360, while the sum is 35.

The square root of 2778425 is about 1666.8608220244. The cubic root of 2778425 is about 140.5830278031.

The spelling of 2778425 in words is "two million, seven hundred seventy-eight thousand, four hundred twenty-five".