171080261 has 4 divisors (see below), whose sum is σ = 186633024. Its totient is φ = 155527500.

The previous prime is 171080243. The next prime is 171080291. The reversal of 171080261 is 162080171.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162080171 = 11 ⋅14734561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171080261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171080261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171080291) 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, 7776365 + ... + 7776386.

It is an arithmetic number, because the mean of its divisors is an integer number (46658256).

Almost surely, 2^171080261 is an apocalyptic number.

171080261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

171080261 is a deficient number, since it is larger than the sum of its proper divisors (15552763).

171080261 is a wasteful number, since it uses less digits than its factorization.

171080261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15552762.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 171080261 is about 13079.7653266410. The cubic root of 171080261 is about 555.1367365929.

The spelling of 171080261 in words is "one hundred seventy-one million, eighty thousand, two hundred sixty-one".