143234421 has 16 divisors (see below), whose sum is σ = 208611840. Its totient is φ = 86695920.

The previous prime is 143234389. The next prime is 143234423. The reversal of 143234421 is 124432341.

It is not a de Polignac number, because 143234421 - 2⁵ = 143234389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143234391 and 143234400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143234423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27966 + ... + 32688.

It is an arithmetic number, because the mean of its divisors is an integer number (13038240).

Almost surely, 2^143234421 is an apocalyptic number.

143234421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143234421 is a deficient number, since it is larger than the sum of its proper divisors (65377419).

143234421 is a wasteful number, since it uses less digits than its factorization.

143234421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656.

The product of its digits is 2304, while the sum is 24.

The square root of 143234421 is about 11968.0583638283. The cubic root of 143234421 is about 523.2177460746.

Adding to 143234421 its reverse (124432341), we get a palindrome (267666762).

It can be divided in two parts, 1432 and 34421, that added together give a palindrome (35853).

The spelling of 143234421 in words is "one hundred forty-three million, two hundred thirty-four thousand, four hundred twenty-one".