142433521 has 2 divisors, whose sum is σ = 142433522. Its totient is φ = 142433520.

The previous prime is 142433513. The next prime is 142433527. The reversal of 142433521 is 125334241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103245921 + 39187600 = 10161^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 142433521 - 2³ = 142433513 is a prime.

It is not a weakly prime, because it can be changed into another prime (142433527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71216760 + 71216761.

It is an arithmetic number, because the mean of its divisors is an integer number (71216761).

Almost surely, 2^142433521 is an apocalyptic number.

It is an amenable number.

142433521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142433521 is an equidigital number, since it uses as much as digits as its factorization.

142433521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 142433521 is about 11934.5515625850. The cubic root of 142433521 is about 522.2407263517.

Adding to 142433521 its reverse (125334241), we get a palindrome (267767762).

The spelling of 142433521 in words is "one hundred forty-two million, four hundred thirty-three thousand, five hundred twenty-one".