25906171 has 2 divisors, whose sum is σ = 25906172. Its totient is φ = 25906170.

The previous prime is 25906169. The next prime is 25906187. The reversal of 25906171 is 17160952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25906171 - 2¹ = 25906169 is a prime.

It is a super-2 number, since 2×25906171² = 1342259391762482, which contains 22 as substring.

Together with 25906169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25906121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12953085 + 12953086.

It is an arithmetic number, because the mean of its divisors is an integer number (12953086).

Almost surely, 2^25906171 is an apocalyptic number.

25906171 is a deficient number, since it is larger than the sum of its proper divisors (1).

25906171 is an equidigital number, since it uses as much as digits as its factorization.

25906171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 25906171 is about 5089.8105072782. The cubic root of 25906171 is about 295.8928080031.

The spelling of 25906171 in words is "twenty-five million, nine hundred six thousand, one hundred seventy-one".