142320517 has 2 divisors, whose sum is σ = 142320518. Its totient is φ = 142320516.

The previous prime is 142320511. The next prime is 142320533. The reversal of 142320517 is 715023241.

It is a happy number.

142320517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141348321 + 972196 = 11889^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 142320517 - 2³ = 142320509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142320491 and 142320500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142320511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71160258 + 71160259.

It is an arithmetic number, because the mean of its divisors is an integer number (71160259).

Almost surely, 2^142320517 is an apocalyptic number.

It is an amenable number.

142320517 is a deficient number, since it is larger than the sum of its proper divisors (1).

142320517 is an equidigital number, since it uses as much as digits as its factorization.

142320517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 142320517 is about 11929.8163020224. The cubic root of 142320517 is about 522.1025779142.

Adding to 142320517 its reverse (715023241), we get a palindrome (857343758).

The spelling of 142320517 in words is "one hundred forty-two million, three hundred twenty thousand, five hundred seventeen".