2565128 has 16 divisors (see below), whose sum is σ = 4829760. Its totient is φ = 1277200.

The previous prime is 2565109. The next prime is 2565139. The reversal of 2565128 is 8215652.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565128.

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 3 ways as a sum of consecutive naturals, for example, 1973 + ... + 3003.

It is an arithmetic number, because the mean of its divisors is an integer number (301860).

2^2565128 is an apocalyptic number.

It is an amenable number.

2565128 is a deficient number, since it is larger than the sum of its proper divisors (2264632).

2565128 is a wasteful number, since it uses less digits than its factorization.

2565128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1344 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2565128 is about 1601.6016983008. The cubic root of 2565128 is about 136.8893560278.

It can be divided in two parts, 2 and 565128, that multiplied together give a triangular number (1130256 = T₁₅₀₃).

The spelling of 2565128 in words is "two million, five hundred sixty-five thousand, one hundred twenty-eight".