159543 has 16 divisors (see below), whose sum is σ = 249600. Its totient is φ = 100440.

The previous prime is 159541. The next prime is 159553. The reversal of 159543 is 345951.

It is not a de Polignac number, because 159543 - 2¹ = 159541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 1 + 5⁷ + 5⁷ + 9² + 4⁵ + 3⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (15600).

2¹⁵⁹⁵⁴³ is an apocalyptic number.

159543 is a deficient number, since it is larger than the sum of its proper divisors (90057).

159543 is a wasteful number, since it uses less digits than its factorization.

159543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 333 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 159543 is about 399.4283415082. The cubic root of 159543 is about 54.2366160078.

The spelling of 159543 in words is "one hundred fifty-nine thousand, five hundred forty-three".