25560505 has 4 divisors (see below), whose sum is σ = 30672612. Its totient is φ = 20448400.

The previous prime is 25560499. The next prime is 25560541. The reversal of 25560505 is 50506552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6165289 + 19395216 = 2483^2 + 4404^2 .

It is not a de Polignac number, because 25560505 - 2⁵ = 25560473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2556046 + ... + 2556055.

It is an arithmetic number, because the mean of its divisors is an integer number (7668153).

Almost surely, 2^25560505 is an apocalyptic number.

It is an amenable number.

25560505 is a deficient number, since it is larger than the sum of its proper divisors (5112107).

25560505 is an equidigital number, since it uses as much as digits as its factorization.

25560505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112106.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 25560505 is about 5055.7398073872. The cubic root of 25560505 is about 294.5708785233.

The spelling of 25560505 in words is "twenty-five million, five hundred sixty thousand, five hundred five".