171120457 has 2 divisors, whose sum is σ = 171120458. Its totient is φ = 171120456.

The previous prime is 171120431. The next prime is 171120463. The reversal of 171120457 is 754021171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163302841 + 7817616 = 12779^2 + 2796^2 .

It is an emirp because it is prime and its reverse (754021171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171120457 - 2¹⁵ = 171087689 is a prime.

It is not a weakly prime, because it can be changed into another prime (171120427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85560228 + 85560229.

It is an arithmetic number, because the mean of its divisors is an integer number (85560229).

Almost surely, 2^171120457 is an apocalyptic number.

It is an amenable number.

171120457 is a deficient number, since it is larger than the sum of its proper divisors (1).

171120457 is an equidigital number, since it uses as much as digits as its factorization.

171120457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 171120457 is about 13081.3018083064. The cubic root of 171120457 is about 555.1802103963.

The spelling of 171120457 in words is "one hundred seventy-one million, one hundred twenty thousand, four hundred fifty-seven".