142122517 has 2 divisors, whose sum is σ = 142122518. Its totient is φ = 142122516.

The previous prime is 142122503. The next prime is 142122529. The reversal of 142122517 is 715221241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87347716 + 54774801 = 9346^2 + 7401^2 .

It is a cyclic number.

It is not a de Polignac number, because 142122517 - 2¹⁵ = 142089749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142122491 and 142122500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142123517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71061258 + 71061259.

It is an arithmetic number, because the mean of its divisors is an integer number (71061259).

Almost surely, 2^142122517 is an apocalyptic number.

It is an amenable number.

142122517 is a deficient number, since it is larger than the sum of its proper divisors (1).

142122517 is an equidigital number, since it uses as much as digits as its factorization.

142122517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 25.

The square root of 142122517 is about 11921.5148785714. The cubic root of 142122517 is about 521.8603446564.

Adding to 142122517 its reverse (715221241), we get a palindrome (857343758).

The spelling of 142122517 in words is "one hundred forty-two million, one hundred twenty-two thousand, five hundred seventeen".