143241521 has 2 divisors, whose sum is σ = 143241522. Its totient is φ = 143241520.

The previous prime is 143241517. The next prime is 143241523. The reversal of 143241521 is 125142341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140090896 + 3150625 = 11836^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 143241521 - 2² = 143241517 is a prime.

Together with 143241523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143241523) 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, 71620760 + 71620761.

It is an arithmetic number, because the mean of its divisors is an integer number (71620761).

Almost surely, 2^143241521 is an apocalyptic number.

It is an amenable number.

143241521 is a deficient number, since it is larger than the sum of its proper divisors (1).

143241521 is an equidigital number, since it uses as much as digits as its factorization.

143241521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 143241521 is about 11968.3549830376. The cubic root of 143241521 is about 523.2263910744.

Adding to 143241521 its reverse (125142341), we get a palindrome (268383862).

The spelling of 143241521 in words is "one hundred forty-three million, two hundred forty-one thousand, five hundred twenty-one".