25905045 has 16 divisors (see below), whose sum is σ = 41549760. Its totient is φ = 13782144.

The previous prime is 25905017. The next prime is 25905067. The reversal of 25905045 is 54050952.

It is a happy number.

It is not a de Polignac number, because 25905045 - 2¹² = 25900949 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 4966 + ... + 8744.

It is an arithmetic number, because the mean of its divisors is an integer number (2596860).

Almost surely, 2^25905045 is an apocalyptic number.

It is an amenable number.

25905045 is a deficient number, since it is larger than the sum of its proper divisors (15644715).

25905045 is a wasteful number, since it uses less digits than its factorization.

25905045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 25905045 is about 5089.6998929210. The cubic root of 25905045 is about 295.8885209920. Note that the first 3 decimals are identical.

Adding to 25905045 its reverse (54050952), we get a palindrome (79955997).

The spelling of 25905045 in words is "twenty-five million, nine hundred five thousand, forty-five".