158845 has 4 divisors (see below), whose sum is σ = 190620. Its totient is φ = 127072.

The previous prime is 158843. The next prime is 158849. The reversal of 158845 is 548851.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49284 + 109561 = 222^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 158845 - 2¹ = 158843 is a prime.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (158843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15880 + ... + 15889.

It is an arithmetic number, because the mean of its divisors is an integer number (47655).

2¹⁵⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

158845 is a deficient number, since it is larger than the sum of its proper divisors (31775).

158845 is an equidigital number, since it uses as much as digits as its factorization.

158845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31774.

The product of its digits is 6400, while the sum is 31.

The square root of 158845 is about 398.5536350355. The cubic root of 158845 is about 54.1574053857.

The spelling of 158845 in words is "one hundred fifty-eight thousand, eight hundred forty-five".