159646 has 4 divisors (see below), whose sum is σ = 239472. Its totient is φ = 79822.

The previous prime is 159631. The next prime is 159667. The reversal of 159646 is 646951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646951 = 523 ⋅1237.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

159646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39910 + ... + 39913.

It is an arithmetic number, because the mean of its divisors is an integer number (59868).

2¹⁵⁹⁶⁴⁶ is an apocalyptic number.

159646 is a deficient number, since it is larger than the sum of its proper divisors (79826).

159646 is an equidigital number, since it uses as much as digits as its factorization.

159646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79825.

The product of its digits is 6480, while the sum is 31.

The square root of 159646 is about 399.5572549710. The cubic root of 159646 is about 54.2482851079.

The spelling of 159646 in words is "one hundred fifty-nine thousand, six hundred forty-six".