159542161 has 9 divisors (see below), whose sum is σ = 169707451. Its totient is φ = 149955232.

The previous prime is 159542153. The next prime is 159542177. The reversal of 159542161 is 161245951.

It is a happy number.

The square root of 159542161 is 12631.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 35331136 = 11145^2 + 5944^2 .

It is not a de Polignac number, because 159542161 - 2³ = 159542153 is a prime.

It is a super-2 number, since 2×159542161² = 50907402273099842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159546161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 214356 + ... + 215098.

Almost surely, 2^159542161 is an apocalyptic number.

159542161 is the 12631-st square number.

159542161 is the 6316-th centered octagonal number.

It is an amenable number.

159542161 is a deficient number, since it is larger than the sum of its proper divisors (10165290).

159542161 is an frugal number, since it uses more digits than its factorization.

159542161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 760 counting only the distinct ones).

The product of its digits is 10800, while the sum is 34.

The cubic root of 159542161 is about 542.3652093504.

The spelling of 159542161 in words is "one hundred fifty-nine million, five hundred forty-two thousand, one hundred sixty-one".