143101421 has 2 divisors, whose sum is σ = 143101422. Its totient is φ = 143101420.

The previous prime is 143101411. The next prime is 143101447. The reversal of 143101421 is 124101341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138980521 + 4120900 = 11789^2 + 2030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143101421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 143101421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143101411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71550710 + 71550711.

It is an arithmetic number, because the mean of its divisors is an integer number (71550711).

Almost surely, 2^143101421 is an apocalyptic number.

It is an amenable number.

143101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143101421 is an equidigital number, since it uses as much as digits as its factorization.

143101421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 143101421 is about 11962.5006165099. The cubic root of 143101421 is about 523.0557517033.

Adding to 143101421 its reverse (124101341), we get a palindrome (267202762).

The spelling of 143101421 in words is "one hundred forty-three million, one hundred one thousand, four hundred twenty-one".