159742209 has 16 divisors (see below), whose sum is σ = 238633920. Its totient is φ = 94196160.

The previous prime is 159742201. The next prime is 159742211. The reversal of 159742209 is 902247951.

It is not a de Polignac number, because 159742209 - 2³ = 159742201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159742201) 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 in 15 ways as a sum of consecutive naturals, for example, 64194 + ... + 66635.

It is an arithmetic number, because the mean of its divisors is an integer number (14914620).

Almost surely, 2^159742209 is an apocalyptic number.

It is an amenable number.

159742209 is a deficient number, since it is larger than the sum of its proper divisors (78891711).

159742209 is a wasteful number, since it uses less digits than its factorization.

159742209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130880.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 159742209 is about 12638.9164488100. The cubic root of 159742209 is about 542.5918030770.

It can be divided in two parts, 159742 and 209, that added together give a palindrome (159951).

The spelling of 159742209 in words is "one hundred fifty-nine million, seven hundred forty-two thousand, two hundred nine".