143134421 has 2 divisors, whose sum is σ = 143134422. Its totient is φ = 143134420.

The previous prime is 143134417. The next prime is 143134423. The reversal of 143134421 is 124431341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114725521 + 28408900 = 10711^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 143134421 - 2² = 143134417 is a prime.

Together with 143134423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143134423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71567210 + 71567211.

It is an arithmetic number, because the mean of its divisors is an integer number (71567211).

Almost surely, 2^143134421 is an apocalyptic number.

It is an amenable number.

143134421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143134421 is an equidigital number, since it uses as much as digits as its factorization.

143134421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 143134421 is about 11963.8798472736. The cubic root of 143134421 is about 523.0959551549.

Adding to 143134421 its reverse (124431341), we get a palindrome (267565762).

The spelling of 143134421 in words is "one hundred forty-three million, one hundred thirty-four thousand, four hundred twenty-one".