171163121 has 4 divisors (see below), whose sum is σ = 176684544. Its totient is φ = 165641700.

The previous prime is 171163117. The next prime is 171163163. The reversal of 171163121 is 121361171.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171163121 - 2² = 171163117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171163721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2760665 + ... + 2760726.

It is an arithmetic number, because the mean of its divisors is an integer number (44171136).

Almost surely, 2^171163121 is an apocalyptic number.

It is an amenable number.

171163121 is a deficient number, since it is larger than the sum of its proper divisors (5521423).

171163121 is an equidigital number, since it uses as much as digits as its factorization.

171163121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521422.

The product of its digits is 252, while the sum is 23.

The square root of 171163121 is about 13082.9324312250. The cubic root of 171163121 is about 555.2263460068.

The spelling of 171163121 in words is "one hundred seventy-one million, one hundred sixty-three thousand, one hundred twenty-one".