143142421 has 2 divisors, whose sum is σ = 143142422. Its totient is φ = 143142420.

The previous prime is 143142403. The next prime is 143142443. The reversal of 143142421 is 124241341.

It is a happy number.

It is an a-pointer prime, because the next prime (143142443) can be obtained adding 143142421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141943396 + 1199025 = 11914^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 143142421 - 2⁹ = 143141909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143142392 and 143142401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143142721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71571210 + 71571211.

It is an arithmetic number, because the mean of its divisors is an integer number (71571211).

Almost surely, 2^143142421 is an apocalyptic number.

It is an amenable number.

143142421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143142421 is an equidigital number, since it uses as much as digits as its factorization.

143142421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 143142421 is about 11964.2141823022. The cubic root of 143142421 is about 523.1057005156.

Adding to 143142421 its reverse (124241341), we get a palindrome (267383762).

The spelling of 143142421 in words is "one hundred forty-three million, one hundred forty-two thousand, four hundred twenty-one".