143643 has 4 divisors (see below), whose sum is σ = 191528. Its totient is φ = 95760.

The previous prime is 143629. The next prime is 143651. The reversal of 143643 is 346341.

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

It is not a de Polignac number, because 143643 - 2⁸ = 143387 is a prime.

It is a super-2 number, since 2×143643² = 41266622898, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143643.

It is not an unprimeable number, because it can be changed into a prime (143653) 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, 23938 + ... + 23943.

It is an arithmetic number, because the mean of its divisors is an integer number (47882).

2¹⁴³⁶⁴³ is an apocalyptic number.

143643 is a deficient number, since it is larger than the sum of its proper divisors (47885).

143643 is an equidigital number, since it uses as much as digits as its factorization.

143643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47884.

The product of its digits is 864, while the sum is 21.

The square root of 143643 is about 379.0026385132. The cubic root of 143643 is about 52.3714770084.

Adding to 143643 its reverse (346341), we get a palindrome (489984).

The spelling of 143643 in words is "one hundred forty-three thousand, six hundred forty-three".