142136557 has 2 divisors, whose sum is σ = 142136558. Its totient is φ = 142136556.

The previous prime is 142136521. The next prime is 142136611. The reversal of 142136557 is 755631241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127893481 + 14243076 = 11309^2 + 3774^2 .

It is a cyclic number.

It is not a de Polignac number, because 142136557 - 2¹⁵ = 142103789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142136957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71068278 + 71068279.

It is an arithmetic number, because the mean of its divisors is an integer number (71068279).

Almost surely, 2^142136557 is an apocalyptic number.

It is an amenable number.

142136557 is a deficient number, since it is larger than the sum of its proper divisors (1).

142136557 is an equidigital number, since it uses as much as digits as its factorization.

142136557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 142136557 is about 11922.1037153684. The cubic root of 142136557 is about 521.8775286048.

Adding to 142136557 its reverse (755631241), we get a palindrome (897767798).

The spelling of 142136557 in words is "one hundred forty-two million, one hundred thirty-six thousand, five hundred fifty-seven".