162543 has 4 divisors (see below), whose sum is σ = 216728. Its totient is φ = 108360.

The previous prime is 162529. The next prime is 162553. The reversal of 162543 is 345261.

It is a happy number.

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

It is not a de Polignac number, because 162543 - 2⁴ = 162527 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27088 + ... + 27093.

It is an arithmetic number, because the mean of its divisors is an integer number (54182).

2¹⁶²⁵⁴³ is an apocalyptic number.

162543 is a deficient number, since it is larger than the sum of its proper divisors (54185).

162543 is an equidigital number, since it uses as much as digits as its factorization.

162543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54184.

The product of its digits is 720, while the sum is 21.

The square root of 162543 is about 403.1662188230. The cubic root of 162543 is about 54.5744570510.

The spelling of 162543 in words is "one hundred sixty-two thousand, five hundred forty-three".