25538785 has 4 divisors (see below), whose sum is σ = 30646548. Its totient is φ = 20431024.

The previous prime is 25538753. The next prime is 25538789. The reversal of 25538785 is 58783552.

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 3972049 + 21566736 = 1993^2 + 4644^2 .

It is a cyclic number.

It is not a de Polignac number, because 25538785 - 2⁵ = 25538753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25538789) 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 3 ways as a sum of consecutive naturals, for example, 2553874 + ... + 2553883.

It is an arithmetic number, because the mean of its divisors is an integer number (7661637).

Almost surely, 2^25538785 is an apocalyptic number.

It is an amenable number.

25538785 is a deficient number, since it is larger than the sum of its proper divisors (5107763).

25538785 is an equidigital number, since it uses as much as digits as its factorization.

25538785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107762.

The product of its digits is 336000, while the sum is 43.

The square root of 25538785 is about 5053.5912972855. The cubic root of 25538785 is about 294.4874178276.

The spelling of 25538785 in words is "twenty-five million, five hundred thirty-eight thousand, seven hundred eighty-five".