159840521 has 8 divisors (see below), whose sum is σ = 168422400. Its totient is φ = 151275600.

The previous prime is 159840497. The next prime is 159840523. The reversal of 159840521 is 125048951.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159840521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159840523) 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 in 7 ways as a sum of consecutive naturals, for example, 18215 + ... + 25523.

It is an arithmetic number, because the mean of its divisors is an integer number (21052800).

Almost surely, 2^159840521 is an apocalyptic number.

It is an amenable number.

159840521 is a deficient number, since it is larger than the sum of its proper divisors (8581879).

159840521 is a wasteful number, since it uses less digits than its factorization.

159840521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 159840521 is about 12642.8051080447. The cubic root of 159840521 is about 542.7030914380.

The spelling of 159840521 in words is "one hundred fifty-nine million, eight hundred forty thousand, five hundred twenty-one".