25671871 has 4 divisors (see below), whose sum is σ = 25686144. Its totient is φ = 25657600.

The previous prime is 25671857. The next prime is 25671881. The reversal of 25671871 is 17817652.

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 25671871 - 2⁷ = 25671743 is a prime.

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 25671871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25671881) 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, 3970 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (6421536).

Almost surely, 2^25671871 is an apocalyptic number.

25671871 is a deficient number, since it is larger than the sum of its proper divisors (14273).

25671871 is a wasteful number, since it uses less digits than its factorization.

25671871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14272.

The product of its digits is 23520, while the sum is 37.

The square root of 25671871 is about 5066.7416551468. The cubic root of 25671871 is about 294.9980695076.

It can be divided in two parts, 256 and 71871, that added together give a palindrome (72127).

The spelling of 25671871 in words is "twenty-five million, six hundred seventy-one thousand, eight hundred seventy-one".