25445505 has 32 divisors (see below), whose sum is σ = 41817600. Its totient is φ = 13208832.

The previous prime is 25445501. The next prime is 25445527. The reversal of 25445505 is 50554452.

25445505 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 25445505 - 2² = 25445501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25445501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129067 + ... + 129263.

It is an arithmetic number, because the mean of its divisors is an integer number (1306800).

Almost surely, 2^25445505 is an apocalyptic number.

It is an amenable number.

25445505 is a deficient number, since it is larger than the sum of its proper divisors (16372095).

25445505 is a wasteful number, since it uses less digits than its factorization.

25445505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

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

The square root of 25445505 is about 5044.3537742708. The cubic root of 25445505 is about 294.1284435762.

Adding to 25445505 its reverse (50554452), we get a palindrome (75999957).

The spelling of 25445505 in words is "twenty-five million, four hundred forty-five thousand, five hundred five".