143645 has 4 divisors (see below), whose sum is σ = 172380. Its totient is φ = 114912.

The previous prime is 143629. The next prime is 143651. The reversal of 143645 is 546341.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52441 + 91204 = 229^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 143645 - 2⁴ = 143629 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 143645.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143645.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14360 + ... + 14369.

It is an arithmetic number, because the mean of its divisors is an integer number (43095).

2¹⁴³⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

143645 is a deficient number, since it is larger than the sum of its proper divisors (28735).

143645 is an equidigital number, since it uses as much as digits as its factorization.

143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28734.

The product of its digits is 1440, while the sum is 23.

The square root of 143645 is about 379.0052770081. The cubic root of 143645 is about 52.3717200704.

Adding to 143645 its reverse (546341), we get a palindrome (689986).

It can be divided in two parts, 1436 and 45, that multiplied together give a triangular number (64620 = T₃₅₉).

The spelling of 143645 in words is "one hundred forty-three thousand, six hundred forty-five".