170540161 has 4 divisors (see below), whose sum is σ = 186043824. Its totient is φ = 155036500.

The previous prime is 170540159. The next prime is 170540173. The reversal of 170540161 is 161045071.

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 170540161 - 2¹ = 170540159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170540761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7751815 + ... + 7751836.

It is an arithmetic number, because the mean of its divisors is an integer number (46510956).

Almost surely, 2^170540161 is an apocalyptic number.

170540161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

170540161 is a deficient number, since it is larger than the sum of its proper divisors (15503663).

170540161 is a wasteful number, since it uses less digits than its factorization.

170540161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15503662.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 170540161 is about 13059.1026108228. The cubic root of 170540161 is about 554.5519322747.

The spelling of 170540161 in words is "one hundred seventy million, five hundred forty thousand, one hundred sixty-one".