143040321 has 12 divisors (see below), whose sum is σ = 207665172. Its totient is φ = 94874976.

The previous prime is 143040311. The next prime is 143040353. The reversal of 143040321 is 123040341.

It can be written as a sum of positive squares in 2 ways, for example, as 87329025 + 55711296 = 9345^2 + 7464^2 .

It is not a de Polignac number, because 143040321 - 2⁶ = 143040257 is a prime.

It is a super-3 number, since 3×143040321³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143040294 and 143040303.

It is not an unprimeable number, because it can be changed into a prime (143040311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38566 + ... + 42111.

It is an arithmetic number, because the mean of its divisors is an integer number (17305431).

Almost surely, 2^143040321 is an apocalyptic number.

It is an amenable number.

143040321 is a deficient number, since it is larger than the sum of its proper divisors (64624851).

143040321 is a wasteful number, since it uses less digits than its factorization.

143040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80880 (or 80877 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 143040321 is about 11959.9465299808. The cubic root of 143040321 is about 522.9812980845.

Adding to 143040321 its reverse (123040341), we get a palindrome (266080662).

The spelling of 143040321 in words is "one hundred forty-three million, forty thousand, three hundred twenty-one".