25660171 has 4 divisors (see below), whose sum is σ = 25708144. Its totient is φ = 25612200.

The previous prime is 25660163. The next prime is 25660211. The reversal of 25660171 is 17106652.

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 25660171 - 2³ = 25660163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25660471) 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, 23175 + ... + 24256.

It is an arithmetic number, because the mean of its divisors is an integer number (6427036).

Almost surely, 2^25660171 is an apocalyptic number.

25660171 is a deficient number, since it is larger than the sum of its proper divisors (47973).

25660171 is an equidigital number, since it uses as much as digits as its factorization.

25660171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47972.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25660171 is about 5065.5869353906. The cubic root of 25660171 is about 294.9532474027.

The spelling of 25660171 in words is "twenty-five million, six hundred sixty thousand, one hundred seventy-one".