143023421 has 2 divisors, whose sum is σ = 143023422. Its totient is φ = 143023420.

The previous prime is 143023403. The next prime is 143023451. The reversal of 143023421 is 124320341.

143023421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121992025 + 21031396 = 11045^2 + 4586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143023421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 143023393 and 143023402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143023451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71511710 + 71511711.

It is an arithmetic number, because the mean of its divisors is an integer number (71511711).

Almost surely, 2^143023421 is an apocalyptic number.

It is an amenable number.

143023421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143023421 is an equidigital number, since it uses as much as digits as its factorization.

143023421 is an evil number, because the sum of its binary digits is even.

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

The square root of 143023421 is about 11959.2399842130. The cubic root of 143023421 is about 522.9607007872.

Adding to 143023421 its reverse (124320341), we get a palindrome (267343762).

The spelling of 143023421 in words is "one hundred forty-three million, twenty-three thousand, four hundred twenty-one".