171257171 has 2 divisors, whose sum is σ = 171257172. Its totient is φ = 171257170.

The previous prime is 171257161. The next prime is 171257221. The reversal of 171257171 is 171752171.

171257171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171257171 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (171257101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85628585 + 85628586.

It is an arithmetic number, because the mean of its divisors is an integer number (85628586).

Almost surely, 2^171257171 is an apocalyptic number.

171257171 is a deficient number, since it is larger than the sum of its proper divisors (1).

171257171 is an equidigital number, since it uses as much as digits as its factorization.

171257171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3430, while the sum is 32.

The square root of 171257171 is about 13086.5263152603. The cubic root of 171257171 is about 555.3280218743.

The spelling of 171257171 in words is "one hundred seventy-one million, two hundred fifty-seven thousand, one hundred seventy-one".