25863287 has 4 divisors (see below), whose sum is σ = 25874760. Its totient is φ = 25851816.

The previous prime is 25863283. The next prime is 25863289. The reversal of 25863287 is 78236852.

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 25863287 - 2² = 25863283 is a prime.

It is a super-2 number, since 2×25863287² = 1337819228888738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25863283) 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, 1112 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (6468690).

Almost surely, 2^25863287 is an apocalyptic number.

25863287 is a deficient number, since it is larger than the sum of its proper divisors (11473).

25863287 is an equidigital number, since it uses as much as digits as its factorization.

25863287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11472.

The product of its digits is 161280, while the sum is 41.

The square root of 25863287 is about 5085.5960319318. The cubic root of 25863287 is about 295.7294482734.

The spelling of 25863287 in words is "twenty-five million, eight hundred sixty-three thousand, two hundred eighty-seven".