158321 has 8 divisors (see below), whose sum is σ = 171360. Its totient is φ = 145728.

The previous prime is 158303. The next prime is 158329. The reversal of 158321 is 123851.

158321 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 158321 - 2¹⁴ = 141937 is a prime.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 158293 and 158302.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 158321.

It is not an unprimeable number, because it can be changed into a prime (158329) 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, 1070 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (21420).

2¹⁵⁸³²¹ is an apocalyptic number.

It is an amenable number.

158321 is a deficient number, since it is larger than the sum of its proper divisors (13039).

158321 is a wasteful number, since it uses less digits than its factorization.

158321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223.

The product of its digits is 240, while the sum is 20.

The square root of 158321 is about 397.8957149807. The cubic root of 158321 is about 54.0977880589.

The spelling of 158321 in words is "one hundred fifty-eight thousand, three hundred twenty-one".