162171841 has 4 divisors (see below), whose sum is σ = 174646612. Its totient is φ = 149697072.

The previous prime is 162171833. The next prime is 162171847. The reversal of 162171841 is 148171261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148171261 = 7 ⋅21167323.

It can be written as a sum of positive squares in 2 ways, for example, as 20657025 + 141514816 = 4545^2 + 11896^2 .

It is a cyclic number.

It is not a de Polignac number, because 162171841 - 2³ = 162171833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162171847) 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, 6237366 + ... + 6237391.

It is an arithmetic number, because the mean of its divisors is an integer number (43661653).

Almost surely, 2^162171841 is an apocalyptic number.

It is an amenable number.

162171841 is a deficient number, since it is larger than the sum of its proper divisors (12474771).

162171841 is a wasteful number, since it uses less digits than its factorization.

162171841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12474770.

The product of its digits is 2688, while the sum is 31.

The square root of 162171841 is about 12734.6708241713. The cubic root of 162171841 is about 545.3288602427.

The spelling of 162171841 in words is "one hundred sixty-two million, one hundred seventy-one thousand, eight hundred forty-one".