25505445 has 32 divisors (see below), whose sum is σ = 46828800. Its totient is φ = 11612160.

The previous prime is 25505419. The next prime is 25505449. The reversal of 25505445 is 54450552.

It is not a de Polignac number, because 25505445 - 2⁷ = 25505317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46875 + ... + 47415.

It is an arithmetic number, because the mean of its divisors is an integer number (1463400).

Almost surely, 2^25505445 is an apocalyptic number.

It is an amenable number.

25505445 is a deficient number, since it is larger than the sum of its proper divisors (21323355).

25505445 is a wasteful number, since it uses less digits than its factorization.

25505445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 25505445 is about 5050.2915757409. The cubic root of 25505445 is about 294.3592143121.

Adding to 25505445 its reverse (54450552), we get a palindrome (79955997).

The spelling of 25505445 in words is "twenty-five million, five hundred five thousand, four hundred forty-five".