25538065 has 16 divisors (see below), whose sum is σ = 35740800. Its totient is φ = 17510640.

The previous prime is 25538059. The next prime is 25538069. The reversal of 25538065 is 56083552.

It is a happy number.

It is not a de Polignac number, because 25538065 - 2¹³ = 25529873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25538065.

It is not an unprimeable number, because it can be changed into a prime (25538069) 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, 5731 + ... + 9160.

It is an arithmetic number, because the mean of its divisors is an integer number (2233800).

Almost surely, 2^25538065 is an apocalyptic number.

It is an amenable number.

25538065 is a deficient number, since it is larger than the sum of its proper divisors (10202735).

25538065 is an equidigital number, since it uses as much as digits as its factorization.

25538065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14917 (or 14903 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 25538065 is about 5053.5200603144. The cubic root of 25538065 is about 294.4846503646.

The spelling of 25538065 in words is "twenty-five million, five hundred thirty-eight thousand, sixty-five".