25649875 has 16 divisors (see below), whose sum is σ = 32239584. Its totient is φ = 20373600.

The previous prime is 25649873. The next prime is 25649881. The reversal of 25649875 is 57894652.

It is not a de Polignac number, because 25649875 - 2¹ = 25649873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25649873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18972 + ... + 20278.

It is an arithmetic number, because the mean of its divisors is an integer number (2014974).

Almost surely, 2^25649875 is an apocalyptic number.

25649875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25649875 is a deficient number, since it is larger than the sum of its proper divisors (6589709).

25649875 is a wasteful number, since it uses less digits than its factorization.

25649875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1469 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 25649875 is about 5064.5705642236. The cubic root of 25649875 is about 294.9137926787.

The spelling of 25649875 in words is "twenty-five million, six hundred forty-nine thousand, eight hundred seventy-five".