159081121 has 8 divisors (see below), whose sum is σ = 168552360. Its totient is φ = 149622528.

The previous prime is 159081113. The next prime is 159081151. The reversal of 159081121 is 121180951.

159081121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 45360225 + 113720896 = 6735^2 + 10664^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159081121 - 2³ = 159081113 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 159081121.

It is not an unprimeable number, because it can be changed into a prime (159081101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38655 + ... + 42571.

It is an arithmetic number, because the mean of its divisors is an integer number (21069045).

Almost surely, 2^159081121 is an apocalyptic number.

It is an amenable number.

159081121 is a deficient number, since it is larger than the sum of its proper divisors (9471239).

159081121 is a wasteful number, since it uses less digits than its factorization.

159081121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 159081121 is about 12612.7364596268. The cubic root of 159081121 is about 541.8422685674.

The spelling of 159081121 in words is "one hundred fifty-nine million, eighty-one thousand, one hundred twenty-one".