143121413 has 2 divisors, whose sum is σ = 143121414. Its totient is φ = 143121412.

The previous prime is 143121403. The next prime is 143121427. The reversal of 143121413 is 314121341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138250564 + 4870849 = 11758^2 + 2207^2 .

It is a cyclic number.

It is not a de Polignac number, because 143121413 - 2¹⁶ = 143055877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143121403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71560706 + 71560707.

It is an arithmetic number, because the mean of its divisors is an integer number (71560707).

Almost surely, 2^143121413 is an apocalyptic number.

It is an amenable number.

143121413 is a deficient number, since it is larger than the sum of its proper divisors (1).

143121413 is an equidigital number, since it uses as much as digits as its factorization.

143121413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 143121413 is about 11963.3361985694. The cubic root of 143121413 is about 523.0801084232.

Adding to 143121413 its reverse (314121341), we get a palindrome (457242754).

The spelling of 143121413 in words is "one hundred forty-three million, one hundred twenty-one thousand, four hundred thirteen".