25505045 has 16 divisors (see below), whose sum is σ = 32199552. Its totient is φ = 19356480.

The previous prime is 25505041. The next prime is 25505057. The reversal of 25505045 is 54050552.

25505045 = 81² + 82² + ... + 425².

It is not a de Polignac number, because 25505045 - 2² = 25505041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505041) 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, 14219 + ... + 15911.

It is an arithmetic number, because the mean of its divisors is an integer number (2012472).

Almost surely, 2^25505045 is an apocalyptic number.

It is an amenable number.

25505045 is a deficient number, since it is larger than the sum of its proper divisors (6694507).

25505045 is a wasteful number, since it uses less digits than its factorization.

25505045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 25505045 is about 5050.2519739118. The cubic root of 25505045 is about 294.3576754995.

Adding to 25505045 its reverse (54050552), we get a palindrome (79555597).

The spelling of 25505045 in words is "twenty-five million, five hundred five thousand, forty-five".