2556425 has 12 divisors (see below), whose sum is σ = 3189900. Its totient is φ = 2032320.

The previous prime is 2556419. The next prime is 2556451. The reversal of 2556425 is 5246552.

It can be written as a sum of positive squares in 6 ways, for example, as 163216 + 2393209 = 404^2 + 1547^2 .

It is not a de Polignac number, because 2556425 - 2¹⁶ = 2490889 is a prime.

It is a d-powerful number, because it can be written as 2¹⁸ + 5⁴ + 5⁷ + 6 + 4⁴ + 2¹⁸ + 5⁹ .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7151 + ... + 7499.

It is an arithmetic number, because the mean of its divisors is an integer number (265825).

2^2556425 is an apocalyptic number.

2556425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2556425 is a deficient number, since it is larger than the sum of its proper divisors (633475).

2556425 is a wasteful number, since it uses less digits than its factorization.

2556425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 647 counting only the distinct ones).

The product of its digits is 12000, while the sum is 29.

The square root of 2556425 is about 1598.8824221937. The cubic root of 2556425 is about 136.7343672772.

The spelling of 2556425 in words is "two million, five hundred fifty-six thousand, four hundred twenty-five".