143032421 has 24 divisors (see below), whose sum is σ = 171383040. Its totient is φ = 118964832.

The previous prime is 143032391. The next prime is 143032429. The reversal of 143032421 is 124230341.

It is a de Polignac number, because none of the positive numbers 2^k-143032421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143032393 and 143032402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143032429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398240 + ... + 398598.

It is an arithmetic number, because the mean of its divisors is an integer number (7140960).

Almost surely, 2^143032421 is an apocalyptic number.

It is an amenable number.

143032421 is a deficient number, since it is larger than the sum of its proper divisors (28350619).

143032421 is a wasteful number, since it uses less digits than its factorization.

143032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 586 counting only the distinct ones).

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

The square root of 143032421 is about 11959.6162563855. The cubic root of 143032421 is about 522.9716699640.

Adding to 143032421 its reverse (124230341), we get a palindrome (267262762).

The spelling of 143032421 in words is "one hundred forty-three million, thirty-two thousand, four hundred twenty-one".