142643 has 4 divisors (see below), whose sum is σ = 144840. Its totient is φ = 140448.

The previous prime is 142619. The next prime is 142657. The reversal of 142643 is 346241.

It is a happy number.

142643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346241 = 7 ⋅49463.

It is a cyclic number.

It is not a de Polignac number, because 142643 - 2¹⁰ = 141619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142673) 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, 998 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (36210).

2¹⁴²⁶⁴³ is an apocalyptic number.

142643 is a deficient number, since it is larger than the sum of its proper divisors (2197).

142643 is an equidigital number, since it uses as much as digits as its factorization.

142643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196.

The product of its digits is 576, while the sum is 20.

The square root of 142643 is about 377.6810823962. The cubic root of 142643 is about 52.2496623224.

Adding to 142643 its reverse (346241), we get a palindrome (488884).

The spelling of 142643 in words is "one hundred forty-two thousand, six hundred forty-three".