25785487 has 16 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 20274912.

The previous prime is 25785479. The next prime is 25785491. The reversal of 25785487 is 78458752.

It is not a de Polignac number, because 25785487 - 2³ = 25785479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25785407) 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 15 ways as a sum of consecutive naturals, for example, 15498 + ... + 17080.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^25785487 is an apocalyptic number.

25785487 is a deficient number, since it is larger than the sum of its proper divisors (6147953).

25785487 is a wasteful number, since it uses less digits than its factorization.

25785487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its digits is 627200, while the sum is 46.

The square root of 25785487 is about 5077.9412166743. The cubic root of 25785487 is about 295.4326200606.

The spelling of 25785487 in words is "twenty-five million, seven hundred eighty-five thousand, four hundred eighty-seven".