25321871 has 4 divisors (see below), whose sum is σ = 25558632. Its totient is φ = 25085112.

The previous prime is 25321867. The next prime is 25321897. The reversal of 25321871 is 17812352.

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 25321871 - 2² = 25321867 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118220 + ... + 118433.

It is an arithmetic number, because the mean of its divisors is an integer number (6389658).

Almost surely, 2^25321871 is an apocalyptic number.

25321871 is a deficient number, since it is larger than the sum of its proper divisors (236761).

25321871 is a wasteful number, since it uses less digits than its factorization.

25321871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236760.

The product of its digits is 3360, while the sum is 29.

The square root of 25321871 is about 5032.0841606635. The cubic root of 25321871 is about 293.6513019256.

The spelling of 25321871 in words is "twenty-five million, three hundred twenty-one thousand, eight hundred seventy-one".