25287 has 4 divisors (see below), whose sum is σ = 33720. Its totient is φ = 16856.

The previous prime is 25261. The next prime is 25301. The reversal of 25287 is 78252.

25287 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 25287 - 2⁸ = 25031 is a prime.

It is a D-number.

25287 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 25287.

It is not an unprimeable number, because it can be changed into a prime (25237) 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, 4212 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (8430).

2²⁵²⁸⁷ is an apocalyptic number.

25287 is a deficient number, since it is larger than the sum of its proper divisors (8433).

25287 is an equidigital number, since it uses as much as digits as its factorization.

25287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8432.

The product of its digits is 1120, while the sum is 24.

The square root of 25287 is about 159.0188668052. The cubic root of 25287 is about 29.3516443294.

The spelling of 25287 in words is "twenty-five thousand, two hundred eighty-seven".