171249601 has 2 divisors, whose sum is σ = 171249602. Its totient is φ = 171249600.

The previous prime is 171249599. The next prime is 171249713. The reversal of 171249601 is 106942171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168376576 + 2873025 = 12976^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 171249601 - 2¹ = 171249599 is a prime.

Together with 171249599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (171249101) 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, 85624800 + 85624801.

It is an arithmetic number, because the mean of its divisors is an integer number (85624801).

Almost surely, 2^171249601 is an apocalyptic number.

It is an amenable number.

171249601 is a deficient number, since it is larger than the sum of its proper divisors (1).

171249601 is an equidigital number, since it uses as much as digits as its factorization.

171249601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 171249601 is about 13086.2370832872. The cubic root of 171249601 is about 555.3198394528.

The spelling of 171249601 in words is "one hundred seventy-one million, two hundred forty-nine thousand, six hundred one".