25256171 has 4 divisors (see below), whose sum is σ = 25288200. Its totient is φ = 25224144.

The previous prime is 25256167. The next prime is 25256177. The reversal of 25256171 is 17165252.

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 25256171 - 2² = 25256167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25256177) 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, 14801 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (6322050).

Almost surely, 2^25256171 is an apocalyptic number.

25256171 is a deficient number, since it is larger than the sum of its proper divisors (32029).

25256171 is an equidigital number, since it uses as much as digits as its factorization.

25256171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32028.

The product of its digits is 4200, while the sum is 29.

The square root of 25256171 is about 5025.5518104980. The cubic root of 25256171 is about 293.3971132261.

The spelling of 25256171 in words is "twenty-five million, two hundred fifty-six thousand, one hundred seventy-one".