25668249 has 16 divisors (see below), whose sum is σ = 36391680. Its totient is φ = 16037120.

The previous prime is 25668239. The next prime is 25668263. The reversal of 25668249 is 94286652.

It is not a de Polignac number, because 25668249 - 2⁴ = 25668233 is a prime.

Its product of digits (207360) is a multiple of the sum of its prime divisors (2160).

It is a self number, because there is not a number n which added to its sum of digits gives 25668249.

It is not an unprimeable number, because it can be changed into a prime (25668229) 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, 12784 + ... + 14654.

It is an arithmetic number, because the mean of its divisors is an integer number (2274480).

Almost surely, 2^25668249 is an apocalyptic number.

It is an amenable number.

25668249 is a deficient number, since it is larger than the sum of its proper divisors (10723431).

25668249 is a wasteful number, since it uses less digits than its factorization.

25668249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 207360, while the sum is 42.

The square root of 25668249 is about 5066.3842136182. The cubic root of 25668249 is about 294.9841952655.

The spelling of 25668249 in words is "twenty-five million, six hundred sixty-eight thousand, two hundred forty-nine".