25506045 has 24 divisors (see below), whose sum is σ = 44568576. Its totient is φ = 13493088.

The previous prime is 25505989. The next prime is 25506049. The reversal of 25506045 is 54060552.

25506045 is a `hidden beast` number, since 2 + 5 + 50 + 604 + 5 = 666.

It is not a de Polignac number, because 25506045 - 2⁷ = 25505917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25506049) 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 23 ways as a sum of consecutive naturals, for example, 3484 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (1857024).

Almost surely, 2^25506045 is an apocalyptic number.

It is an amenable number.

25506045 is a deficient number, since it is larger than the sum of its proper divisors (19062531).

25506045 is a wasteful number, since it uses less digits than its factorization.

25506045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4601 (or 4598 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 25506045 is about 5050.3509779024. The cubic root of 25506045 is about 294.3615225009.

Adding to 25506045 its reverse (54060552), we get a palindrome (79566597).

The spelling of 25506045 in words is "twenty-five million, five hundred six thousand, forty-five".