25385871 has 24 divisors (see below), whose sum is σ = 40055040. Its totient is φ = 14255472.

The previous prime is 25385851. The next prime is 25385891. The reversal of 25385871 is 17858352.

It is an interprime number because it is at equal distance from previous prime (25385851) and next prime (25385891).

It is not a de Polignac number, because 25385871 - 2⁵ = 25385839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25385851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7210 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (1668960).

Almost surely, 2^25385871 is an apocalyptic number.

25385871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25385871 is a deficient number, since it is larger than the sum of its proper divisors (14669169).

25385871 is a wasteful number, since it uses less digits than its factorization.

25385871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003 (or 2996 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 25385871 is about 5038.4393417010. The cubic root of 25385871 is about 293.8984910333.

The spelling of 25385871 in words is "twenty-five million, three hundred eighty-five thousand, eight hundred seventy-one".