158281 has 4 divisors (see below), whose sum is σ = 160272. Its totient is φ = 156292.

The previous prime is 158269. The next prime is 158293. The reversal of 158281 is 182851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (158269) and next prime (158293).

It is a cyclic number.

It is not a de Polignac number, because 158281 - 2⁹ = 157769 is a prime.

It is a super-2 number, since 2×158281² = 50105749922, which contains 22 as substring.

It is a Duffinian number.

158281 is a lucky number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (158201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871 + ... + 1036.

It is an arithmetic number, because the mean of its divisors is an integer number (40068).

2¹⁵⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

158281 is a deficient number, since it is larger than the sum of its proper divisors (1991).

158281 is an equidigital number, since it uses as much as digits as its factorization.

158281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 640, while the sum is 25.

The square root of 158281 is about 397.8454473788. The cubic root of 158281 is about 54.0932317171.

Subtracting from 158281 its product of digits (640), we obtain a triangular number (157641 = T₅₆₁).

The spelling of 158281 in words is "one hundred fifty-eight thousand, two hundred eighty-one".