159390721 has 8 divisors (see below), whose sum is σ = 182349440. Its totient is φ = 136479168.

The previous prime is 159390701. The next prime is 159390761. The reversal of 159390721 is 127093951.

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

It is not a de Polignac number, because 159390721 - 2¹³ = 159382529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159390701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4221 + ... + 18346.

It is an arithmetic number, because the mean of its divisors is an integer number (22793680).

Almost surely, 2^159390721 is an apocalyptic number.

It is an amenable number.

159390721 is a deficient number, since it is larger than the sum of its proper divisors (22958719).

159390721 is a wasteful number, since it uses less digits than its factorization.

159390721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23583.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 159390721 is about 12625.0038019796. The cubic root of 159390721 is about 542.1935477476.

The spelling of 159390721 in words is "one hundred fifty-nine million, three hundred ninety thousand, seven hundred twenty-one".