25648129 has 12 divisors (see below), whose sum is σ = 28554708. Its totient is φ = 22900320.

The previous prime is 25648123. The next prime is 25648163. The reversal of 25648129 is 92184652.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 17514225 = 2852^2 + 4185^2 .

It is not a de Polignac number, because 25648129 - 2¹³ = 25639937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25648123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11467 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (2379559).

Almost surely, 2^25648129 is an apocalyptic number.

It is an amenable number.

25648129 is a deficient number, since it is larger than the sum of its proper divisors (2906579).

25648129 is a wasteful number, since it uses less digits than its factorization.

25648129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128 (or 2097 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 25648129 is about 5064.3981873466. The cubic root of 25648129 is about 294.9071008830.

The spelling of 25648129 in words is "twenty-five million, six hundred forty-eight thousand, one hundred twenty-nine".