25106505 has 16 divisors (see below), whose sum is σ = 42285120. Its totient is φ = 12685248.

The previous prime is 25106383. The next prime is 25106509. The reversal of 25106505 is 50560152.

It is not a de Polignac number, because 25106505 - 2¹⁶ = 25040969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25106509) 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, 43762 + ... + 44331.

It is an arithmetic number, because the mean of its divisors is an integer number (2642820).

Almost surely, 2^25106505 is an apocalyptic number.

It is an amenable number.

25106505 is a deficient number, since it is larger than the sum of its proper divisors (17178615).

25106505 is a wasteful number, since it uses less digits than its factorization.

25106505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88120.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 25106505 is about 5010.6391807832. The cubic root of 25106505 is about 292.8164155709.

Adding to 25106505 its reverse (50560152), we get a palindrome (75666657).

The spelling of 25106505 in words is "twenty-five million, one hundred six thousand, five hundred five".