159585421 has 2 divisors, whose sum is σ = 159585422. Its totient is φ = 159585420.

The previous prime is 159585359. The next prime is 159585449. The reversal of 159585421 is 124585951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158482921 + 1102500 = 12589^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 159585421 - 2¹¹ = 159583373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159585121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79792710 + 79792711.

It is an arithmetic number, because the mean of its divisors is an integer number (79792711).

Almost surely, 2^159585421 is an apocalyptic number.

It is an amenable number.

159585421 is a deficient number, since it is larger than the sum of its proper divisors (1).

159585421 is an equidigital number, since it uses as much as digits as its factorization.

159585421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 40.

The square root of 159585421 is about 12632.7123374199. The cubic root of 159585421 is about 542.4142258580.

The spelling of 159585421 in words is "one hundred fifty-nine million, five hundred eighty-five thousand, four hundred twenty-one".