159856421 has 8 divisors (see below), whose sum is σ = 162153600. Its totient is φ = 157566240.

The previous prime is 159856399. The next prime is 159856453. The reversal of 159856421 is 124658951.

159856421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 159856421 - 2⁶ = 159856357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159856621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58790 + ... + 61448.

It is an arithmetic number, because the mean of its divisors is an integer number (20269200).

Almost surely, 2^159856421 is an apocalyptic number.

It is an amenable number.

159856421 is a deficient number, since it is larger than the sum of its proper divisors (2297179).

159856421 is an equidigital number, since it uses as much as digits as its factorization.

159856421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499.

The product of its digits is 86400, while the sum is 41.

The square root of 159856421 is about 12643.4339085551. The cubic root of 159856421 is about 542.7210858176.

The spelling of 159856421 in words is "one hundred fifty-nine million, eight hundred fifty-six thousand, four hundred twenty-one".