142305234521 has 2 divisors, whose sum is σ = 142305234522. Its totient is φ = 142305234520.

The previous prime is 142305234437. The next prime is 142305234527. The reversal of 142305234521 is 125432503241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138175758400 + 4129476121 = 371720^2 + 64261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142305234521 is a prime.

It is not a weakly prime, because it can be changed into another prime (142305234527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71152617260 + 71152617261.

It is an arithmetic number, because the mean of its divisors is an integer number (71152617261).

Almost surely, 2^142305234521 is an apocalyptic number.

It is an amenable number.

142305234521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142305234521 is an equidigital number, since it uses as much as digits as its factorization.

142305234521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 142305234521 its reverse (125432503241), we get a palindrome (267737737762).

The spelling of 142305234521 in words is "one hundred forty-two billion, three hundred five million, two hundred thirty-four thousand, five hundred twenty-one".