25505005 has 8 divisors (see below), whose sum is σ = 30633624. Its totient is φ = 20385600.

The previous prime is 25505003. The next prime is 25505017. The reversal of 25505005 is 50050552.

It can be written as a sum of positive squares in 4 ways, for example, as 644809 + 24860196 = 803^2 + 4986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25505005 - 2¹ = 25505003 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 (25505003) 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 7 ways as a sum of consecutive naturals, for example, 7935 + ... + 10675.

It is an arithmetic number, because the mean of its divisors is an integer number (3829203).

Almost surely, 2^25505005 is an apocalyptic number.

It is an amenable number.

25505005 is a deficient number, since it is larger than the sum of its proper divisors (5128619).

25505005 is a wasteful number, since it uses less digits than its factorization.

25505005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607.

The product of its (nonzero) digits is 1250, while the sum is 22.

The square root of 25505005 is about 5050.2480137118. The cubic root of 25505005 is about 294.3575216174.

Adding to 25505005 its reverse (50050552), we get a palindrome (75555557).

The spelling of 25505005 in words is "twenty-five million, five hundred five thousand, five".