158643 has 6 divisors (see below), whose sum is σ = 229164. Its totient is φ = 105756.

The previous prime is 158633. The next prime is 158647. The reversal of 158643 is 346851.

158643 is a `hidden beast` number, since 15 + 8 + 643 = 666.

It is not a de Polignac number, because 158643 - 2⁵ = 158611 is a prime.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (158647) 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 5 ways as a sum of consecutive naturals, for example, 8805 + ... + 8822.

It is an arithmetic number, because the mean of its divisors is an integer number (38194).

2¹⁵⁸⁶⁴³ is an apocalyptic number.

158643 is a deficient number, since it is larger than the sum of its proper divisors (70521).

158643 is a wasteful number, since it uses less digits than its factorization.

158643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17633 (or 17630 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 158643 is about 398.3001380868. The cubic root of 158643 is about 54.1344386855.

The spelling of 158643 in words is "one hundred fifty-eight thousand, six hundred forty-three".