25288449 has 16 divisors (see below), whose sum is σ = 35604480. Its totient is φ = 15921360.

The previous prime is 25288447. The next prime is 25288451. The reversal of 25288449 is 94488252.

It is an interprime number because it is at equal distance from previous prime (25288447) and next prime (25288451).

It is not a de Polignac number, because 25288449 - 2¹ = 25288447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25288449.

It is not an unprimeable number, because it can be changed into a prime (25288447) 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 15 ways as a sum of consecutive naturals, for example, 27304 + ... + 28214.

It is an arithmetic number, because the mean of its divisors is an integer number (2225280).

Almost surely, 2^25288449 is an apocalyptic number.

It is an amenable number.

25288449 is a deficient number, since it is larger than the sum of its proper divisors (10316031).

25288449 is a wasteful number, since it uses less digits than its factorization.

25288449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420.

The product of its digits is 184320, while the sum is 42.

The square root of 25288449 is about 5028.7621737362. The cubic root of 25288449 is about 293.5220495630.

The spelling of 25288449 in words is "twenty-five million, two hundred eighty-eight thousand, four hundred forty-nine".