143421421457 has 2 divisors, whose sum is σ = 143421421458. Its totient is φ = 143421421456.

The previous prime is 143421421427. The next prime is 143421421499. The reversal of 143421421457 is 754124124341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75216353536 + 68205067921 = 274256^2 + 261161^2 .

It is a cyclic number.

It is not a de Polignac number, because 143421421457 - 2⁸ = 143421421201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143421421457.

It is not a weakly prime, because it can be changed into another prime (143421421427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71710710728 + 71710710729.

It is an arithmetic number, because the mean of its divisors is an integer number (71710710729).

Almost surely, 2^143421421457 is an apocalyptic number.

It is an amenable number.

143421421457 is a deficient number, since it is larger than the sum of its proper divisors (1).

143421421457 is an equidigital number, since it uses as much as digits as its factorization.

143421421457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 38.

Adding to 143421421457 its reverse (754124124341), we get a palindrome (897545545798).

The spelling of 143421421457 in words is "one hundred forty-three billion, four hundred twenty-one million, four hundred twenty-one thousand, four hundred fifty-seven".