25787 has 4 divisors (see below), whose sum is σ = 26136. Its totient is φ = 25440.

The previous prime is 25771. The next prime is 25793. The reversal of 25787 is 78752.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25787 - 2⁴ = 25771 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25787.

It is not an unprimeable number, because it can be changed into a prime (25717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 227.

It is an arithmetic number, because the mean of its divisors is an integer number (6534).

2²⁵⁷⁸⁷ is an apocalyptic number.

25787 is a deficient number, since it is larger than the sum of its proper divisors (349).

25787 is a wasteful number, since it uses less digits than its factorization.

25787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348.

The product of its digits is 3920, while the sum is 29.

The square root of 25787 is about 160.5833117108. The cubic root of 25787 is about 29.5438398257.

The spelling of 25787 in words is "twenty-five thousand, seven hundred eighty-seven".