159994 has 4 divisors (see below), whose sum is σ = 239994. Its totient is φ = 79996.

The previous prime is 159979. The next prime is 160001. The reversal of 159994 is 499951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499951 = 23 ⋅21737.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 3969 = 395^2 + 63^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39997 + ... + 40000.

2¹⁵⁹⁹⁹⁴ is an apocalyptic number.

159994 is a deficient number, since it is larger than the sum of its proper divisors (80000).

159994 is an equidigital number, since it uses as much as digits as its factorization.

159994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79999.

The product of its digits is 14580, while the sum is 37.

The square root of 159994 is about 399.9924999297. The cubic root of 159994 is about 54.2876737190.

It can be divided in two parts, 1 and 59994, that added together give a palindrome (59995).

The spelling of 159994 in words is "one hundred fifty-nine thousand, nine hundred ninety-four".