158994 has 36 divisors (see below), whose sum is σ = 383838. Its totient is φ = 47520.

The previous prime is 158993. The next prime is 159013. The reversal of 158994 is 499851.

It can be written as a sum of positive squares in only one way, i.e., 131769 + 27225 = 363^2 + 165^2 .

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (158993) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2142 + ... + 2214.

2¹⁵⁸⁹⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191919).

158994 is an abundant number, since it is smaller than the sum of its proper divisors (224844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158994 is a wasteful number, since it uses less digits than its factorization.

158994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 89 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 158994 is about 398.7405171286. The cubic root of 158994 is about 54.1743336945.

It can be divided in two parts, 15 and 8994, that added together give a palindrome (9009).

The spelling of 158994 in words is "one hundred fifty-eight thousand, nine hundred ninety-four".