143423421 has 4 divisors (see below), whose sum is σ = 191231232. Its totient is φ = 95615612.

The previous prime is 143423417. The next prime is 143423429. The reversal of 143423421 is 124324341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143423421 - 2² = 143423417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 143423391 and 143423400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143423429) 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, 23903901 + ... + 23903906.

It is an arithmetic number, because the mean of its divisors is an integer number (47807808).

Almost surely, 2^143423421 is an apocalyptic number.

It is an amenable number.

143423421 is a deficient number, since it is larger than the sum of its proper divisors (47807811).

143423421 is an equidigital number, since it uses as much as digits as its factorization.

143423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47807810.

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

The square root of 143423421 is about 11975.9517784600. The cubic root of 143423421 is about 523.4477761897.

Adding to 143423421 its reverse (124324341), we get a palindrome (267747762).

The spelling of 143423421 in words is "one hundred forty-three million, four hundred twenty-three thousand, four hundred twenty-one".