159139121 has 2 divisors, whose sum is σ = 159139122. Its totient is φ = 159139120.

The previous prime is 159139111. The next prime is 159139157. The reversal of 159139121 is 121931951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111598096 + 47541025 = 10564^2 + 6895^2 .

It is an emirp because it is prime and its reverse (121931951) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159139121 is a prime.

It is not a weakly prime, because it can be changed into another prime (159139111) 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 as a sum of consecutive naturals, namely, 79569560 + 79569561.

It is an arithmetic number, because the mean of its divisors is an integer number (79569561).

Almost surely, 2^159139121 is an apocalyptic number.

It is an amenable number.

159139121 is a deficient number, since it is larger than the sum of its proper divisors (1).

159139121 is an equidigital number, since it uses as much as digits as its factorization.

159139121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 32.

The square root of 159139121 is about 12615.0355132279. The cubic root of 159139121 is about 541.9081113542.

The spelling of 159139121 in words is "one hundred fifty-nine million, one hundred thirty-nine thousand, one hundred twenty-one".