25863871 has 6 divisors (see below), whose sum is σ = 28429016. Its totient is φ = 23512500.

The previous prime is 25863857. The next prime is 25863899. The reversal of 25863871 is 17836852.

It is not a de Polignac number, because 25863871 - 2⁵ = 25863839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25863821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106755 + ... + 106996.

Almost surely, 2^25863871 is an apocalyptic number.

25863871 is a deficient number, since it is larger than the sum of its proper divisors (2565145).

25863871 is a wasteful number, since it uses less digits than its factorization.

25863871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213773 (or 213762 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 25863871 is about 5085.6534486730. The cubic root of 25863871 is about 295.7316741402.

The spelling of 25863871 in words is "twenty-five million, eight hundred sixty-three thousand, eight hundred seventy-one".