170749121 has 4 divisors (see below), whose sum is σ = 170784132. Its totient is φ = 170714112.

The previous prime is 170749069. The next prime is 170749141. The reversal of 170749121 is 121947071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 94867600 = 8711^2 + 9740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170749121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170749141) 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 in 3 ways as a sum of consecutive naturals, for example, 8720 + ... + 20433.

It is an arithmetic number, because the mean of its divisors is an integer number (42696033).

Almost surely, 2^170749121 is an apocalyptic number.

It is an amenable number.

170749121 is a deficient number, since it is larger than the sum of its proper divisors (35011).

170749121 is an equidigital number, since it uses as much as digits as its factorization.

170749121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35010.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 170749121 is about 13067.1007113284. The cubic root of 170749121 is about 554.7783342260.

The spelling of 170749121 in words is "one hundred seventy million, seven hundred forty-nine thousand, one hundred twenty-one".