25716287 has 4 divisors (see below), whose sum is σ = 25784520. Its totient is φ = 25648056.

The previous prime is 25716259. The next prime is 25716293. The reversal of 25716287 is 78261752.

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 25716287 - 2²⁰ = 24667711 is a prime.

It is a super-2 number, since 2×25716287² = 1322654834132738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25716287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25716227) 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 3 ways as a sum of consecutive naturals, for example, 33548 + ... + 34305.

It is an arithmetic number, because the mean of its divisors is an integer number (6446130).

Almost surely, 2^25716287 is an apocalyptic number.

25716287 is a deficient number, since it is larger than the sum of its proper divisors (68233).

25716287 is an equidigital number, since it uses as much as digits as its factorization.

25716287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68232.

The product of its digits is 47040, while the sum is 38.

The square root of 25716287 is about 5071.1228539644. The cubic root of 25716287 is about 295.1681010704.

The spelling of 25716287 in words is "twenty-five million, seven hundred sixteen thousand, two hundred eighty-seven".